57111222 has 32 divisors (see below), whose sum is σ = 130904064. Its totient is φ = 16272000.

The previous prime is 57111199. The next prime is 57111247. The reversal of 57111222 is 22211175.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15147 + ... + 18537.

It is an arithmetic number, because the mean of its divisors is an integer number (4090752).

Almost surely, 2^57111222 is an apocalyptic number.

57111222 is an abundant number, since it is smaller than the sum of its proper divisors (73792842).

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

57111222 is a wasteful number, since it uses less digits than its factorization.

57111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3804.

The product of its digits is 280, while the sum is 21.

The square root of 57111222 is about 7557.1967024817. The cubic root of 57111222 is about 385.1002651097.

Adding to 57111222 its reverse (22211175), we get a palindrome (79322397).

The spelling of 57111222 in words is "fifty-seven million, one hundred eleven thousand, two hundred twenty-two".