57219138 has 12 divisors (see below), whose sum is σ = 123974838. Its totient is φ = 19073040.

The previous prime is 57219119. The next prime is 57219143. The reversal of 57219138 is 83191275.

It can be written as a sum of positive squares in only one way, i.e., 57108249 + 110889 = 7557^2 + 333^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1589403 + ... + 1589438.

Almost surely, 2^57219138 is an apocalyptic number.

57219138 is an abundant number, since it is smaller than the sum of its proper divisors (66755700).

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

57219138 is a wasteful number, since it uses less digits than its factorization.

57219138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178849 (or 3178846 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 57219138 is about 7564.3332819225. Note that the first 3 decimals coincide. The cubic root of 57219138 is about 385.3426712442.

The spelling of 57219138 in words is "fifty-seven million, two hundred nineteen thousand, one hundred thirty-eight".