57511361 has 4 divisors (see below), whose sum is σ = 57676500. Its totient is φ = 57346224.

The previous prime is 57511351. The next prime is 57511373. The reversal of 57511361 is 16311575.

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 33930625 + 23580736 = 5825^2 + 4856^2 .

It is a cyclic number.

It is not a de Polignac number, because 57511361 - 2⁶ = 57511297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57511301) 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, 82046 + ... + 82743.

It is an arithmetic number, because the mean of its divisors is an integer number (14419125).

Almost surely, 2^57511361 is an apocalyptic number.

57511361 is the 3392-nd centered decagonal number.

It is an amenable number.

57511361 is a deficient number, since it is larger than the sum of its proper divisors (165139).

57511361 is a wasteful number, since it uses less digits than its factorization.

57511361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165138.

The product of its digits is 3150, while the sum is 29.

The square root of 57511361 is about 7583.6245292077. The cubic root of 57511361 is about 385.9975502543.

The spelling of 57511361 in words is "fifty-seven million, five hundred eleven thousand, three hundred sixty-one".