52 (fifty-two) is the natural number following 51 and preceding 53. In mathematics, a natural number can mean either an element of the set {1, 2, 3, ...} (i. ... 51 (fifty-one) is the natural number 51 following 50 and preceding 52. ... 53 (fifty-three) is the natural number following 52 and preceding 54. ...

Aleph-0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are a generalized kind of number used to denote the size of a set. ... Commonly, ordinal numbers, or ordinals for short, are numbers used to denote the position in an ordered sequence: first, second, third, fourth, etc. ... In mathematics, factorization or factoring is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or factors, which when multiplied together give the original. ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... In mathematics and computer science, hexadecimal, base-16, or simply hex, is a numeral system with a radix, or base, of 16, usually written using the symbols 0–9 and A–F, or a–f. ... The duodecimal (also known as base-12 or dozenal) system is a numeral system using twelve as its base. ...

In mathematics

Fifty-two is the 5th Bell number and a decagonal number. It is an untouchable number, since it is never the sum of proper divisors of any number, and it is a noncototient since it is never the answer to the equation x - φ(x). The Bell numbers, named in honor of Eric Temple Bell, are a sequence of integers arising in combinatorics that begins thus (sequence A000110 in OEIS): In general, Bn is the number of partitions of a set of size n. ... A decagonal number is a figurate number that represents a decagon. ... An untouchable number is an integer that can not be expressed as the sum of the proper divisors of any integer. ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... A noncototient is a positive integer n that can not be expressed as the difference between a positive integer m and the number of coprime integers below it. ...

In science

• The atomic number of tellurium

It has been suggested that List of elements by atomic number be merged into this article or section. ... General Name, Symbol, Number tellurium, Te, 52 Chemical series metalloids Group, Period, Block 16, 5, p Appearance silvery lustrous gray Atomic mass 127. ...

Astronomy

• Messier object M52, a magnitude 8.0 open cluster in the constellation Cassiopeia, also known as
• The New General Catalogue object NGC 52, a spiral galaxy in the constellation Pegasus
• The Saros number of the solar eclipse series which began on -1378 August 14 and ended on 155 February 19. The duration of Saros series 52 was 1532.5 years, and it contained 86 solar eclipses. The Saros number of the lunar eclipse series which began on -1026 May 27 and ended on 204 June 29. The duration of Saros series 52 was 1280.1 years, and it contained 72 lunar eclipses.

The Messier objects are a set of astronomical objects catalogued by Charles Messier in his catalogue of Nebulae and Star Clusters first published in 1774. ... Open Cluster M52 (also known as Messier Object 52, Messier 52, M52, or NGC 7654) is an open cluster in the Cassiopeia constellation. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... The Pleiades is one of the most famous open clusters. ... This article or section does not cite its references or sources. ... Cassiopeia (IPA: ) is a northern constellation which Greek mythology considered to represent a vain queen who boasted about her unrivaled beauty. ... The New General Catalogue (NGC) is the most well-known catalogue of deep sky objects in amateur astronomy. ... A spiral galaxy is a type of galaxy in the Hubble sequence which is characterized by the following physical properties: Spiral Galaxy M74 presents a face-on view of its spiral arms. ... Pegasus (IPA: ) is a northern constellation, named after the mythological Pegasus, named for the winged horse. ... A Saros cycle is a period of 6585 + 1/3 days (approximately 18 years 10 days and 8 hours) which can be used to predict eclipses of the Sun and the Moon. ... Photo taken during the 1999 eclipse. ... August 14 is the 226th day of the year in the Gregorian calendar (227th in leap years), with 139 days remaining. ... Events Roman Emperor Antoninus Pius starts a new war against the Parthians Pope Anicetus succeeds Pope Pius I First year of Yongshou era of the Chinese Han Dynasty Births Dio Cassius, Roman historian Cao Cao, future ruler of the Kingdom of Wei Deaths July 11 - Pope Pius I Saint Polycarp... February 19 is the 50th day of the year in the Gregorian Calendar. ... A lunar eclipse occurs whenever the Moon passes through some portion of the Earths shadow. ... May 27 is the 147th day (148th in leap years) of the year in the Gregorian calendar, with 218 days remaining. ... Events Births Philip the Arab, Roman Emperor (approximate date) Deaths Categories: 204 ... June 29 is the 180th day of the year (181st in leap years) in the Gregorian Calendar, with 185 days remaining. ...

In other fields

The piano has 52 white keys

Fifty-two is: Photo of a piano keyboard. ... Photo of a piano keyboard. ... A short grand piano, with the top up. ...

• The approximate number of weeks in a year. 52 weeks equal 364 days, while the tropical year is 365.24 days long. According to ISO 8601, most years have 52 weeks while some have 53.
• The number of countries in Africa
• The number of sons of Nebo in the Census of men of Israel upon return from exile (Holy Bible, Ezra 2:29)
• A significant number in the Maya calendar
• On the piano, the number of white keys (notes in the C major scale)
• The number of cards in a standard deck of playing cards, not counting Jokers or advertisement cards
• The name of a practical joke card game 52 Pick-up
• "52-Pickup" is a film starring Roy Scheider
• The code for international direct dial phone calls to Mexico
• A comic series from DC Comics entitled 52 has 52 issues.
• A second comic series from DC Comics entitled Countdown will also have 52 issues, counting down from Issue #51 to #0.
• The number of letters in the English alphabet, if majuscules are distinguished from minuscules

• Manhattan's 52nd Street between 5th and 7th Aves was known as Swing Street during the 1930s and 1940s
• Billy Joel CD "52nd Street"

• At age 52: Fiorello LaGuardia became Mayor of New York (1934-1945)
• At age 52: Alfred Hitchcock directed film Strangers on a Train (1951)
• At age 52: Ray Kroc opened the first McDonald's in Des Plaines, Ill. (1955)

A tropical year is the length of time that the Sun, as viewed from the Earth, takes to return to the same position along the ecliptic (its path among the stars on the celestial sphere). ... ISO 8601, Data elements and interchange formats – Information interchange – Representation of dates and times is an international standard for date and time representations. ... A world map showing the continent of Africa. ... The Bible (From Greek βιβλια—biblia, meaning books, which in turn is derived from βυβλος—byblos meaning papyrus, from the ancient Phoenician city of Byblos which exported papyrus) is the sacred scripture of Christianity. ... The Maya calendar is actually a system of distinct calendars and almanacs used by the Maya civilization of pre-Columbian Mesoamerica, and by some modern Maya communities in highland Guatemala. ... A short grand piano, with the top up. ... A one octave music scale in C major. ... Some typical modern playing cards. ... 52 Pick-up is a ficticious card game which serves as a practical joke. ... This is a list of country calling codes, also known as international direct dialing (IDD) codes, which are needed to access international telephone services. ... See comedian Stand up comedian List of Comedians List of British comedians comics comic book comic strip underground comics alternative comics web comic sprite comics manga graphic novel List of comic characters This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the... DC Comics is one of the largest American companies in comic book and related media publishing. ... -1... Countdown is the title of comic book limited series published by DC Comics, which is scheduled to debut on May 09, 2007, directly following the conclusion of the 52-issue 52. ... Vintage German letter balance for home use Look up letter in Wiktionary, the free dictionary. ... The Latin alphabet, also called the Roman alphabet, is the most widely used alphabetic writing system in the world today. ... Majuscules or capital letters (in the Roman alphabet: A, B, C, ...) are one type of case in a writing system. ... It has been suggested that this article or section be merged into Letter case. ... 52nd Street, properly West 52nd Street, is a cross street in Manhattan in the Broadway district known as the street of jazz, the street that never sleeps or, simply, the street. The blocks of 52nd Street between 5th and 6th avenues were renowned in the mid 20th century for the... Fiorello Henry LaGuardia (December 11, 1882–September 20, 1947) was the Mayor of New York from 1934 to 1945. ... NY redirects here. ... Sir Alfred Joseph Hitchcock, KBE (August 13, 1899 – April 29, 1980) was a highly influential film director and producer who pioneered many techniques in the suspense and thriller genres. ... Strangers on a Train is a thriller novel by Patricia Highsmith, who also wrote The Talented Mr. ... This article or section does not adequately cite its references or sources. ... McDonalds Corporation (NYSE: MCD) is the worlds largest chain of fast-food restaurants, primarily selling hamburgers, chicken, french fries, milkshakes and soft drinks. ... This article is about the suburb of Des Plaines, Illinois. ...

Sports

• For over twenty years, 52 was the best-known car number of retired NASCAR driver Jimmy Means
• Number worn by Ray Lewis of the Baltimore Ravens in the NFL
• Number worn by Frank Gatski of the Cleveland Browns in the NFL
• Number worn by Todd Fuller, of the Charlotte Hornets in the NBA
• Number worn by Buck Williams of the Nets in the NBA
• Number worn by Craig Rivet of the Montreal Canadiens in the NHL

The National Association for Stock Car Auto Racing (NASCAR) is the largest sanctioning body of motorsports in the United States. ... Jimmy Smut Means is a former Winston Cup/Nextel Cup owner/driver. ... Ray Lewis may mean any of several people: Ray Lewis (football), an American professional American football player Ray Lewis (runner), a Canadian track-and-field athlete Ray Lewis (singer), an American rhythm and blues singer and member of The Drifters Category: ... City Baltimore, Maryland Team colors Purple, Black, and Gold Head Coach Brian Billick Owner Steve Bisciotti General manager Ozzie Newsome Mascot Edgar, Allan, and Poe League/Conference affiliations National Football League (1996–present) American Football Conference (1996-present) AFC Central (1996-2001) AFC North (2002-present) Team history Baltimore Ravens... Frank Gatski (March 13, 1922 in Farmington, West Virginia - died November 21, 2005) was an American football player. ... ... Todd Douglas Fuller (born July 25, 1974 in Fayetteville, North Carolina) is an American professional basketball player who was selected by the Golden State Warriors with the 11th overall pick of the 1996 NBA Draft. ... Charlotte Hornets may refer to several sports teams based in Charlotte, North Carolina: The NBAs New Orleans/Oklahoma City Hornets, formerly based in Charlotte (1988-2002). ... Charles Linwood Williams (born March 8, 1960 in Rocky Mount, North Carolina), better known as Buck, is a former American professional basketball player. ... Bird netting on wine grapes Net may refer to: A device made by fibers woven in a grid-like structure, as in fishing net, a soccer goal, or the court divider in tennis; In circuit design, a collection of terminals that are or should be connected to each other electrically... Craig Rivet (Born September 13, 1974 in North Bay, Ontario, Canada) is a Canadian professional ice hockey player who plays for the Montreal Canadiens in the National Hockey League. ... The Montreal Canadiens are a professional ice hockey team based in Montreal, Quebec, Canada. ...

Historical years

52 B.C., 52 A.D., 1952, 2052, etc. Centuries: 2nd century BC - 1st century BC - 1st century Decades: 100s BC 90s BC 80s BC 70s BC 60s BC - 50s BC - 40s BC 30s BC 20s BC 10s BC 0s BC Years: 57 BC 56 BC 55 BC 54 BC 53 BC 52 BC 51 BC 50 BC 49... A Roman law prohibits the execution of old and crippled slaves. ... 1952 (MCMLII) was a Leap year starting on Tuesday (link will take you to calendar). ... 2052 (MMLII) will be a leap year starting on Monday of the Gregorian calendar. ...