257717056 has 14 divisors (see below), whose sum is σ = 511407410. Its totient is φ = 128858496.

The previous prime is 257717051. The next prime is 257717071. The reversal of 257717056 is 650717752.

257717056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 213627456 + 44089600 = 14616^2 + 6640^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257717051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2013351 + ... + 2013478.

Almost surely, 2^257717056 is an apocalyptic number.

It is an amenable number.

257717056 is a deficient number, since it is larger than the sum of its proper divisors (253690354).

257717056 is an equidigital number, since it uses as much as digits as its factorization.

257717056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026841 (or 4026831 counting only the distinct ones).

The product of its (nonzero) digits is 102900, while the sum is 40.

The square root of 257717056 is about 16053.5683260763. The cubic root of 257717056 is about 636.3768714229.

The spelling of 257717056 in words is "two hundred fifty-seven million, seven hundred seventeen thousand, fifty-six".