57516861 has 16 divisors (see below), whose sum is σ = 78566400. Its totient is φ = 37411248.

The previous prime is 57516841. The next prime is 57516863. The reversal of 57516861 is 16861575.

It is not a de Polignac number, because 57516861 - 2¹¹ = 57514813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57516863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86950 + ... + 87608.

It is an arithmetic number, because the mean of its divisors is an integer number (4910400).

Almost surely, 2^57516861 is an apocalyptic number.

It is an amenable number.

57516861 is a deficient number, since it is larger than the sum of its proper divisors (21049539).

57516861 is a wasteful number, since it uses less digits than its factorization.

57516861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328.

The product of its digits is 50400, while the sum is 39.

The square root of 57516861 is about 7583.9871439764. The cubic root of 57516861 is about 386.0098545991.

The spelling of 57516861 in words is "fifty-seven million, five hundred sixteen thousand, eight hundred sixty-one".