251313897 has 8 divisors (see below), whose sum is σ = 335820256. Its totient is φ = 167175072.

The previous prime is 251313883. The next prime is 251313901. The reversal of 251313897 is 798313152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 251313897 - 2¹⁴ = 251297513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251313697) 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, 90283 + ... + 93024.

It is an arithmetic number, because the mean of its divisors is an integer number (41977532).

Almost surely, 2^251313897 is an apocalyptic number.

It is an amenable number.

251313897 is a deficient number, since it is larger than the sum of its proper divisors (84506359).

251313897 is a wasteful number, since it uses less digits than its factorization.

251313897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183767.

The product of its digits is 45360, while the sum is 39.

The square root of 251313897 is about 15852.8829239353. The cubic root of 251313897 is about 631.0622015346.

The spelling of 251313897 in words is "two hundred fifty-one million, three hundred thirteen thousand, eight hundred ninety-seven".