57151861 has 16 divisors (see below), whose sum is σ = 63367920. Its totient is φ = 51217920.

The previous prime is 57151813. The next prime is 57151883. The reversal of 57151861 is 16815175.

It can be written as a sum of positive squares in 8 ways, for example, as 6599761 + 50552100 = 2569^2 + 7110^2 .

It is not a de Polignac number, because 57151861 - 2⁷ = 57151733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57151811) 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, 74721 + ... + 75481.

It is an arithmetic number, because the mean of its divisors is an integer number (3960495).

Almost surely, 2^57151861 is an apocalyptic number.

It is an amenable number.

57151861 is a deficient number, since it is larger than the sum of its proper divisors (6216059).

57151861 is a wasteful number, since it uses less digits than its factorization.

57151861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936.

The product of its digits is 8400, while the sum is 34.

The square root of 57151861 is about 7559.8849858976. The cubic root of 57151861 is about 385.1915862110.

The spelling of 57151861 in words is "fifty-seven million, one hundred fifty-one thousand, eight hundred sixty-one".