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Fifty-three

For the year A.D. 53, see 53.


Fifty-three (53, LIII) is the natural number following fifty-two and preceding fifty-four.

Fifty-three is the 16th smallest prime number. The next is fifty-nine. Fifty-three is also the sum of five consecutive primes (5 + 7 + 11 + 13 + 17).

Fifty-three is also: