57222618 has 16 divisors (see below), whose sum is σ = 114794976. Its totient is φ = 19015920.

The previous prime is 57222601. The next prime is 57222631. The reversal of 57222618 is 81622275.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12421 + ... + 16392.

It is an arithmetic number, because the mean of its divisors is an integer number (7174686).

Almost surely, 2^57222618 is an apocalyptic number.

57222618 is an abundant number, since it is smaller than the sum of its proper divisors (57572358).

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

57222618 is a wasteful number, since it uses less digits than its factorization.

57222618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29149.

The product of its digits is 13440, while the sum is 33.

The square root of 57222618 is about 7564.5633053072. The cubic root of 57222618 is about 385.3504831137.

The spelling of 57222618 in words is "fifty-seven million, two hundred twenty-two thousand, six hundred eighteen".