57111121 has 8 divisors (see below), whose sum is σ = 59308200. Its totient is φ = 54929280.

The previous prime is 57111113. The next prime is 57111127. The reversal of 57111121 is 12111175.

It can be written as a sum of positive squares in 4 ways, for example, as 3294225 + 53816896 = 1815^2 + 7336^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57111121 - 2³ = 57111113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57111127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4141 + ... + 11461.

It is an arithmetic number, because the mean of its divisors is an integer number (7413525).

Almost surely, 2^57111121 is an apocalyptic number.

It is an amenable number.

57111121 is a deficient number, since it is larger than the sum of its proper divisors (2197079).

57111121 is a wasteful number, since it uses less digits than its factorization.

57111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7619.

The product of its digits is 70, while the sum is 19.

The square root of 57111121 is about 7557.1900201067. The cubic root of 57111121 is about 385.1000380957.

Adding to 57111121 its reverse (12111175), we get a palindrome (69222296).

The spelling of 57111121 in words is "fifty-seven million, one hundred eleven thousand, one hundred twenty-one".