251911056 has 40 divisors (see below), whose sum is σ = 651520800. Its totient is φ = 83873536.

The previous prime is 251911043. The next prime is 251911057. The reversal of 251911056 is 650119152.

251911056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (251911057) 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, 47851 + ... + 52853.

It is an arithmetic number, because the mean of its divisors is an integer number (16288020).

Almost surely, 2^251911056 is an apocalyptic number.

It is an amenable number.

251911056 is an abundant number, since it is smaller than the sum of its proper divisors (399609744).

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

251911056 is a wasteful number, since it uses less digits than its factorization.

251911056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6063 (or 6057 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 251911056 is about 15871.7061464734. The cubic root of 251911056 is about 631.5616385490.

The spelling of 251911056 in words is "two hundred fifty-one million, nine hundred eleven thousand, fifty-six".