57312613 has 4 divisors (see below), whose sum is σ = 59288940. Its totient is φ = 55336288.

The previous prime is 57312589. The next prime is 57312623. The reversal of 57312613 is 31621375.

57312613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16378209 + 40934404 = 4047^2 + 6398^2 .

It is a cyclic number.

It is not a de Polignac number, because 57312613 - 2⁵ = 57312581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57312623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988120 + ... + 988177.

It is an arithmetic number, because the mean of its divisors is an integer number (14822235).

Almost surely, 2^57312613 is an apocalyptic number.

It is an amenable number.

57312613 is a deficient number, since it is larger than the sum of its proper divisors (1976327).

57312613 is a wasteful number, since it uses less digits than its factorization.

57312613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976326.

The product of its digits is 3780, while the sum is 28.

The square root of 57312613 is about 7570.5094280372. The cubic root of 57312613 is about 385.5523930891.

Adding to 57312613 its reverse (31621375), we get a palindrome (88933988).

The spelling of 57312613 in words is "fifty-seven million, three hundred twelve thousand, six hundred thirteen".