57113391 has 4 divisors (see below), whose sum is σ = 76151192. Its totient is φ = 38075592.

The previous prime is 57113341. The next prime is 57113431. The reversal of 57113391 is 19331175.

It is a happy number.

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

It is not a de Polignac number, because 57113391 - 2¹¹ = 57111343 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 (57113321) 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, 9518896 + ... + 9518901.

It is an arithmetic number, because the mean of its divisors is an integer number (19037798).

Almost surely, 2^57113391 is an apocalyptic number.

57113391 is a deficient number, since it is larger than the sum of its proper divisors (19037801).

57113391 is a wasteful number, since it uses less digits than its factorization.

57113391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19037800.

The product of its digits is 2835, while the sum is 30.

The square root of 57113391 is about 7557.3402067129. The cubic root of 57113391 is about 385.1051402281.

The spelling of 57113391 in words is "fifty-seven million, one hundred thirteen thousand, three hundred ninety-one".