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Encyclopedia > Two hundred twenty

220 (two hundred [and] twenty) is the natural number following 219 and preceding 221.

220
Ordinal two hundred twenty
Cardinal two hundred twentieth
Factorization
Roman numeral CCXX
Binary 11011100
Hexadecimal DC

Mathematics

It is a composite number, with its divisors being 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110, making it an amicable number with two hundred eighty-four. Also, being divisible by the sum of its digits, 220 is a Harshad number.


It is the sum of four consecutive primes (47 + 53 + 59 + 61).


It is a tetrahedral number, the sum of the first ten triangular numbers.


Other fields

220 is:

  • A common voltage in the United States and Canada.
  • In the Holy Bible, the number of goats Jacob gave to his brother Esau ("two hundred she-goats and twenty he-goats") and the number of rams ("two hundred ewes and twenty rams," Genesis 32:14).
  • An SMTP code meaning "service ready"
  • A film format for medium format cameras (see 120 film).
  • The designation of some spur routes of U.S. Interstate 20.
  • The year A.D. 220.

  Results from FactBites:
 
two hundred - definition of two hundred in Encyclopedia (1650 words)
Two hundred and two 202 = 2·101, sum of four consecutive primes (43 + 47 + 53 + 59), Smith number, nontotient, noncototient, also HTTP status code meaning the request was accepted but has not yet been fulfilled, also telephone area code for District of Columbia.
Two hundred ten 210 = 2·3·5·7, primorial, triangular number, sum of eight consecutive primes (13 + 17 + 19 + 23 + 29 + 31 + 37 + 41), pronic number, pentagonal number, Harshad number, untouchable number.
Two hundred fifty-one 251 prime, Sophie Germain prime, sum of three consecutive primes (79 + 83 + 89), sum of seven consecutive primes (23 + 29 + 31 + 37 + 41 + 43 + 47).
  More results at FactBites »


 

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