253921956 has 24 divisors (see below), whose sum is σ = 592876704. Its totient is φ = 84584640.

The previous prime is 253921949. The next prime is 253921957. The reversal of 253921956 is 659129352.

It is not an unprimeable number, because it can be changed into a prime (253921957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14536 + ... + 26816.

It is an arithmetic number, because the mean of its divisors is an integer number (24703196).

Almost surely, 2^253921956 is an apocalyptic number.

It is an amenable number.

253921956 is an abundant number, since it is smaller than the sum of its proper divisors (338954748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253921956 is a wasteful number, since it uses less digits than its factorization.

253921956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14011 (or 14009 counting only the distinct ones).

The product of its digits is 145800, while the sum is 42.

The square root of 253921956 is about 15934.9288043593. The cubic root of 253921956 is about 633.2376836777.

The spelling of 253921956 in words is "two hundred fifty-three million, nine hundred twenty-one thousand, nine hundred fifty-six".