257465031 has 4 divisors (see below), whose sum is σ = 343286712. Its totient is φ = 171643352.

The previous prime is 257465027. The next prime is 257465057. The reversal of 257465031 is 130564752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257465031 - 2² = 257465027 is a prime.

It is a super-2 number, since 2×257465031² = 132576484375661922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257464983 and 257465001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257465071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42910836 + ... + 42910841.

It is an arithmetic number, because the mean of its divisors is an integer number (85821678).

Almost surely, 2^257465031 is an apocalyptic number.

257465031 is a deficient number, since it is larger than the sum of its proper divisors (85821681).

257465031 is an equidigital number, since it uses as much as digits as its factorization.

257465031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85821680.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 257465031 is about 16045.7169051433. The cubic root of 257465031 is about 636.1693632457.

The spelling of 257465031 in words is "two hundred fifty-seven million, four hundred sixty-five thousand, thirty-one".