57111111 has 12 divisors (see below), whose sum is σ = 82951960. Its totient is φ = 37862640.

The previous prime is 57111079. The next prime is 57111113. The reversal of 57111111 is 11111175.

It is not a de Polignac number, because 57111111 - 2⁵ = 57111079 is a prime.

It is a Duffinian number.

57111111 is a modest number, since divided by 11111 gives 571 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57111113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15901 + ... + 19158.

Almost surely, 2^57111111 is an apocalyptic number.

57111111 is a deficient number, since it is larger than the sum of its proper divisors (25840849).

57111111 is a wasteful number, since it uses less digits than its factorization.

57111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35246 (or 35243 counting only the distinct ones).

The product of its digits is 35, while the sum is 18.

The square root of 57111111 is about 7557.1893584851. The cubic root of 57111111 is about 385.1000156190.

Adding to 57111111 its reverse (11111175), we get a palindrome (68222286).

The spelling of 57111111 in words is "fifty-seven million, one hundred eleven thousand, one hundred eleven".