251130879 has 12 divisors (see below), whose sum is σ = 371181096. Its totient is φ = 163526832.

The previous prime is 251130871. The next prime is 251130881. The reversal of 251130879 is 978031152.

It is not a de Polignac number, because 251130879 - 2³ = 251130871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251130871) 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, 324072 + ... + 324845.

It is an arithmetic number, because the mean of its divisors is an integer number (30931758).

Almost surely, 2^251130879 is an apocalyptic number.

251130879 is a deficient number, since it is larger than the sum of its proper divisors (120050217).

251130879 is a wasteful number, since it uses less digits than its factorization.

251130879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648966 (or 648963 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 251130879 is about 15847.1094840668. The cubic root of 251130879 is about 630.9089751099.

The spelling of 251130879 in words is "two hundred fifty-one million, one hundred thirty thousand, eight hundred seventy-nine".