251008056 has 48 divisors (see below), whose sum is σ = 732109560. Its totient is φ = 77232960.

The previous prime is 251008049. The next prime is 251008057. The reversal of 251008056 is 650800152.

251008056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251008057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133150 + ... + 135021.

Almost surely, 2^251008056 is an apocalyptic number.

251008056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

251008056 is an abundant number, since it is smaller than the sum of its proper divisors (481101504).

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

251008056 is a wasteful number, since it uses less digits than its factorization.

251008056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268196 (or 268189 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 251008056 is about 15843.2337608204. The cubic root of 251008056 is about 630.8061034257.

The spelling of 251008056 in words is "two hundred fifty-one million, eight thousand, fifty-six".