57187681 has 16 divisors (see below), whose sum is σ = 61286400. Its totient is φ = 53258688.

The previous prime is 57187667. The next prime is 57187687. The reversal of 57187681 is 18678175.

57187681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57187681 - 2¹¹ = 57185633 is a prime.

It is a super-2 number, since 2×57187681² = 6540861716315522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57187687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239160 + ... + 239398.

It is an arithmetic number, because the mean of its divisors is an integer number (3830400).

Almost surely, 2^57187681 is an apocalyptic number.

It is an amenable number.

57187681 is a deficient number, since it is larger than the sum of its proper divisors (4098719).

57187681 is a wasteful number, since it uses less digits than its factorization.

57187681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528.

The product of its digits is 94080, while the sum is 43.

The square root of 57187681 is about 7562.2536984685. The cubic root of 57187681 is about 385.2720425066.

The spelling of 57187681 in words is "fifty-seven million, one hundred eighty-seven thousand, six hundred eighty-one".