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Encyclopedia > Number 222

Two hundred twenty-two is the natural number following two hundred twenty-one and preceding two hundred twenty-three. It is a repdigit composite number, and its factorization makes it a sphenic number. It is also a Harshad number.

List of numbers — Integers

<< 0 100 200 300 400 500 600 700 800 900 >>
Cardinal Two hundred [and] twenty-two
Ordinal 222nd
Factorization
Roman numeral CCXXII
Binary 11011110
Hexadecimal DE

There is no solution to the equation x - φ(x) = 222, making 222 a noncototient. Nor is there, in base 10, an integer that added to the sum of its own digits yields 222, making 222 a self number.


Radii at 0° and approximately 222.49° divide a circle in the golden ratio.

Circle divided in the golden ratio
The ratio of the areas B / A equals the golden ratio

The first triple repdigit in the square root of 222 is 222:

√222 =
14.89966442575133971933181604612395114023452166218124
    73380574030119289350747022456370098357196526519656
    52139396484012226637696242316850851449289924...

A prime reciprocal magic square based on 223 in base three has a magic constant of 222.


Given 10 unlabelled nodes, 222 lattices can be created.


See also

For the year, see 222 AD or 222 BC.


  Results from FactBites:
 
222 (number) - definition of 222 (number) in Encyclopedia (189 words)
It is a repdigit composite number, and its factorization makes it a sphenic number.
Nor is there, in base 10, an integer that added to the sum of its own digits yields 222, making 222 a self number.
A prime reciprocal magic square based on 223 in base three has a magic constant of 222.
222 (number) - definition of 222 (number) in Encyclopedia (189 words)
Radii at 0° and approximately 222.49° divide a circle in the golden ratio.
The first triple repdigit in the square root of 222 is 222:
For the year, see 222 AD or 222 BC.
  More results at FactBites »


 

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