257681056 has 24 divisors (see below), whose sum is σ = 509429844. Its totient is φ = 128302080.

The previous prime is 257681051. The next prime is 257681063. The reversal of 257681056 is 650186752.

It can be written as a sum of positive squares in 2 ways, for example, as 212576400 + 45104656 = 14580^2 + 6716^2 .

It is a super-3 number, since 3×257681056³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (257681051) 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, 8995 + ... + 24418.

Almost surely, 2^257681056 is an apocalyptic number.

It is an amenable number.

257681056 is a deficient number, since it is larger than the sum of its proper divisors (251748788).

257681056 is a wasteful number, since it uses less digits than its factorization.

257681056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33664 (or 33656 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 257681056 is about 16052.4470408720. The cubic root of 257681056 is about 636.3472386226.

The spelling of 257681056 in words is "two hundred fifty-seven million, six hundred eighty-one thousand, fifty-six".