57247317257 has 16 divisors (see below), whose sum is σ = 62710905600. Its totient is φ = 51938675712.

The previous prime is 57247317247. The next prime is 57247317263. The reversal of 57247317257 is 75271374275.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 57247317257 - 2¹² = 57247313161 is a prime.

It is a super-2 number, since 2×57247317257² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57247317247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317888 + ... + 464270.

It is an arithmetic number, because the mean of its divisors is an integer number (3919431600).

Almost surely, 2^57247317257 is an apocalyptic number.

It is an amenable number.

57247317257 is a deficient number, since it is larger than the sum of its proper divisors (5463588343).

57247317257 is a wasteful number, since it uses less digits than its factorization.

57247317257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146912.

The product of its digits is 2881200, while the sum is 50.

The spelling of 57247317257 in words is "fifty-seven billion, two hundred forty-seven million, three hundred seventeen thousand, two hundred fifty-seven".