57512681 has 4 divisors (see below), whose sum is σ = 57528912. Its totient is φ = 57496452.

The previous prime is 57512671. The next prime is 57512687. The reversal of 57512681 is 18621575.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57512681 - 2⁶ = 57512617 is a prime.

It is a super-2 number, since 2×57512681² = 6615416951615522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57512687) 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, 275 + ... + 10728.

It is an arithmetic number, because the mean of its divisors is an integer number (14382228).

Almost surely, 2^57512681 is an apocalyptic number.

It is an amenable number.

57512681 is a deficient number, since it is larger than the sum of its proper divisors (16231).

57512681 is a wasteful number, since it uses less digits than its factorization.

57512681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16230.

The product of its digits is 16800, while the sum is 35.

The square root of 57512681 is about 7583.7115583334. The cubic root of 57512681 is about 386.0005033686. Note that the first 3 decimals are identical.

The spelling of 57512681 in words is "fifty-seven million, five hundred twelve thousand, six hundred eighty-one".