Monday, March 9, 2009

22

22 = 2 x 11.

22 is a pentagonal number.


22 is the smallest number that can be expressed as the sum of two primes in three ways: 22 = 3 + 19 = 5 + 17 = 11 + 11.

22 is the number of integer partitions of 8.

22 is the smallest multidigit number such that the sum of its digits equals the product of its digits: 2 + 2 = 2 x 2.

22 has a unique representation as a sum of three squares: 22 = 22 + 32 + 32.


The Hebrew alphabet has
22 letters.

Source:
Number Gossip
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