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 ← 51 52 53 →
Cardinal fifty-two
Ordinal 52nd
(fifty-second)
Factorization 22· 13
Divisors 1, 2, 4, 13, 26, 52
Roman numeral LII
Binary 1101002
Ternary 12213
Quaternary 3104
Quinary 2025
Octal 648
Duodecimal 4412
Hexadecimal 3416
Vigesimal 2C20
Base 36 1G36

52 (fifty-two) 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(x).

## In other fields

The piano has 52 white keys

Fifty-two is:

## Historical years

52 B.C., 52 A.D., 1952, 2052, etc.

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/52_(number) — Please support Wikipedia.
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