57312861 has 4 divisors (see below), whose sum is σ = 76417152. Its totient is φ = 38208572.

The previous prime is 57312859. The next prime is 57312869. The reversal of 57312861 is 16821375.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57312861 - 2¹ = 57312859 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57312869) 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, 9552141 + ... + 9552146.

It is an arithmetic number, because the mean of its divisors is an integer number (19104288).

Almost surely, 2^57312861 is an apocalyptic number.

It is an amenable number.

57312861 is a deficient number, since it is larger than the sum of its proper divisors (19104291).

57312861 is a wasteful number, since it uses less digits than its factorization.

57312861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19104290.

The product of its digits is 10080, while the sum is 33.

The square root of 57312861 is about 7570.5258073664. The cubic root of 57312861 is about 385.5529492021.

The spelling of 57312861 in words is "fifty-seven million, three hundred twelve thousand, eight hundred sixty-one".