52 (number)


52 is the natural number following 51 and preceding 53.

In mathematics

Fifty-two is the 6th 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.

In science

has 52 white keys
Fifty-two is:
, AD 52, 1052, 1952, 2052, etc.