57115818 has 24 divisors (see below), whose sum is σ = 131031108. Its totient is φ = 17918592.

The previous prime is 57115813. The next prime is 57115859. The reversal of 57115818 is 81851175.

It is a happy number.

57115818 is a `hidden beast` number, since 5 + 71 + 1 + 581 + 8 = 666.

57115818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 57108249 + 7569 = 7557^2 + 87^2 .

It is not an unprimeable number, because it can be changed into a prime (57115811) 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 11 ways as a sum of consecutive naturals, for example, 93021 + ... + 93632.

Almost surely, 2^57115818 is an apocalyptic number.

57115818 is an abundant number, since it is smaller than the sum of its proper divisors (73915290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57115818 is a wasteful number, since it uses less digits than its factorization.

57115818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186678 (or 186675 counting only the distinct ones).

The product of its digits is 11200, while the sum is 36.

The square root of 57115818 is about 7557.5007773734. The cubic root of 57115818 is about 385.1105950897.

The spelling of 57115818 in words is "fifty-seven million, one hundred fifteen thousand, eight hundred eighteen".