251116255 has 24 divisors (see below), whose sum is σ = 343498320. Its totient is φ = 175668480.

The previous prime is 251116241. The next prime is 251116301. The reversal of 251116255 is 552611152.

It is not a de Polignac number, because 251116255 - 2⁵ = 251116223 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8235 + ... + 23875.

It is an arithmetic number, because the mean of its divisors is an integer number (14312430).

Almost surely, 2^251116255 is an apocalyptic number.

251116255 is a deficient number, since it is larger than the sum of its proper divisors (92382065).

251116255 is a wasteful number, since it uses less digits than its factorization.

251116255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15691 (or 15678 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

The square root of 251116255 is about 15846.6480682825. The cubic root of 251116255 is about 630.8967283856.

The spelling of 251116255 in words is "two hundred fifty-one million, one hundred sixteen thousand, two hundred fifty-five".