57223391 has 4 divisors (see below), whose sum is σ = 57261792. Its totient is φ = 57184992.

The previous prime is 57223367. The next prime is 57223399. The reversal of 57223391 is 19332275.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57223391 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 (57223399) 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, 16871 + ... + 19976.

It is an arithmetic number, because the mean of its divisors is an integer number (14315448).

Almost surely, 2^57223391 is an apocalyptic number.

57223391 is a deficient number, since it is larger than the sum of its proper divisors (38401).

57223391 is a wasteful number, since it uses less digits than its factorization.

57223391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38400.

The product of its digits is 11340, while the sum is 32.

The square root of 57223391 is about 7564.6143986326. The cubic root of 57223391 is about 385.3522182934.

The spelling of 57223391 in words is "fifty-seven million, two hundred twenty-three thousand, three hundred ninety-one".