57511121 has 4 divisors (see below), whose sum is σ = 57829044. Its totient is φ = 57193200.

The previous prime is 57511099. The next prime is 57511123. The reversal of 57511121 is 12111575.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1784896 + 55726225 = 1336^2 + 7465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57511121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57511123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158690 + ... + 159051.

It is an arithmetic number, because the mean of its divisors is an integer number (14457261).

Almost surely, 2^57511121 is an apocalyptic number.

It is an amenable number.

57511121 is a deficient number, since it is larger than the sum of its proper divisors (317923).

57511121 is a wasteful number, since it uses less digits than its factorization.

57511121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317922.

The product of its digits is 350, while the sum is 23.

The square root of 57511121 is about 7583.6087056229. The cubic root of 57511121 is about 385.9970133195.

Adding to 57511121 its reverse (12111575), we get a palindrome (69622696).

The spelling of 57511121 in words is "fifty-seven million, five hundred eleven thousand, one hundred twenty-one".