251056164 has 12 divisors (see below), whose sum is σ = 585797744. Its totient is φ = 83685384.

The previous prime is 251056123. The next prime is 251056241. The reversal of 251056164 is 461650152.

251056164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10460662 + ... + 10460685.

Almost surely, 2^251056164 is an apocalyptic number.

It is an amenable number.

251056164 is an abundant number, since it is smaller than the sum of its proper divisors (334741580).

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

251056164 is a wasteful number, since it uses less digits than its factorization.

251056164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20921354 (or 20921352 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 251056164 is about 15844.7519387335. The cubic root of 251056164 is about 630.8464007798.

The spelling of 251056164 in words is "two hundred fifty-one million, fifty-six thousand, one hundred sixty-four".