251013056 has 28 divisors (see below), whose sum is σ = 569262768. Its totient is φ = 107576832.

The previous prime is 251013023. The next prime is 251013071. The reversal of 251013056 is 650310152.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

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, 279701 + ... + 280596.

Almost surely, 2^251013056 is an apocalyptic number.

It is an amenable number.

251013056 is an abundant number, since it is smaller than the sum of its proper divisors (318249712).

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

251013056 is an equidigital number, since it uses as much as digits as its factorization.

251013056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560316 (or 560306 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 251013056 is about 15843.3915561031. The cubic root of 251013056 is about 630.8102918830.

The spelling of 251013056 in words is "two hundred fifty-one million, thirteen thousand, fifty-six".