57122538 has 16 divisors (see below), whose sum is σ = 124631136. Its totient is φ = 17309840.

The previous prime is 57122521. The next prime is 57122557. The reversal of 57122538 is 83522175.

It is a super-2 number, since 2×57122538² = 6525968695122888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 57122499 and 57122508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432681 + ... + 432812.

It is an arithmetic number, because the mean of its divisors is an integer number (7789446).

Almost surely, 2^57122538 is an apocalyptic number.

57122538 is an abundant number, since it is smaller than the sum of its proper divisors (67508598).

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

57122538 is a wasteful number, since it uses less digits than its factorization.

57122538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865509.

The product of its digits is 16800, while the sum is 33.

The square root of 57122538 is about 7557.9453557167. The cubic root of 57122538 is about 385.1256979795.

The spelling of 57122538 in words is "fifty-seven million, one hundred twenty-two thousand, five hundred thirty-eight".