57111 has 4 divisors (see below), whose sum is σ = 76152. Its totient is φ = 38072.

The previous prime is 57107. The next prime is 57119. The reversal of 57111 is 11175.

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

It is a cyclic number.

It is not a de Polignac number, because 57111 - 2² = 57107 is a prime.

It is a D-number.

57111 is a modest number, since divided by 111 gives 57 as remainder.

57111 is a lucky number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9516 + ... + 9521.

It is an arithmetic number, because the mean of its divisors is an integer number (19038).

2⁵⁷¹¹¹ is an apocalyptic number.

57111 is a deficient number, since it is larger than the sum of its proper divisors (19041).

57111 is a wasteful number, since it uses less digits than its factorization.

57111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19040.

The product of its digits is 35, while the sum is 15.

The square root of 57111 is about 238.9790785822. The cubic root of 57111 is about 38.5099766128.

Adding to 57111 its reverse (11175), we get a palindrome (68286).

The spelling of 57111 in words is "fifty-seven thousand, one hundred eleven".