257164256 has 24 divisors (see below), whose sum is σ = 506666160. Its totient is φ = 128487168.

The previous prime is 257164247. The next prime is 257164267. The reversal of 257164256 is 652461752.

It is a super-2 number, since 2×257164256² = 132266909128067072, which contains 22 as substring.

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, 64925 + ... + 68771.

It is an arithmetic number, because the mean of its divisors is an integer number (21111090).

Almost surely, 2^257164256 is an apocalyptic number.

It is an amenable number.

257164256 is a deficient number, since it is larger than the sum of its proper divisors (249501904).

257164256 is a wasteful number, since it uses less digits than its factorization.

257164256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5946 (or 5938 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 257164256 is about 16036.3417274639. The cubic root of 257164256 is about 635.9215387829.

The spelling of 257164256 in words is "two hundred fifty-seven million, one hundred sixty-four thousand, two hundred fifty-six".