57218858 has 4 divisors (see below), whose sum is σ = 85828290. Its totient is φ = 28609428.

The previous prime is 57218851. The next prime is 57218867. The reversal of 57218858 is 85881275.

57218858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 48260809 + 8958049 = 6947^2 + 2993^2 .

It is not an unprimeable number, because it can be changed into a prime (57218851) 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 as a sum of consecutive naturals, namely, 14304713 + ... + 14304716.

Almost surely, 2^57218858 is an apocalyptic number.

57218858 is a deficient number, since it is larger than the sum of its proper divisors (28609432).

57218858 is a wasteful number, since it uses less digits than its factorization.

57218858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28609431.

The product of its digits is 179200, while the sum is 44.

The square root of 57218858 is about 7564.3147739898. The cubic root of 57218858 is about 385.3420426892.

The spelling of 57218858 in words is "fifty-seven million, two hundred eighteen thousand, eight hundred fifty-eight".