56251921 has 8 divisors (see below), whose sum is σ = 62524224. Its totient is φ = 50172720.

The previous prime is 56251919. The next prime is 56251931. The reversal of 56251921 is 12915265.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56251921 - 2¹ = 56251919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56251901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47661 + ... + 48826.

It is an arithmetic number, because the mean of its divisors is an integer number (7815528).

Almost surely, 2^56251921 is an apocalyptic number.

It is an amenable number.

56251921 is a deficient number, since it is larger than the sum of its proper divisors (6272303).

56251921 is a wasteful number, since it uses less digits than its factorization.

56251921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96551.

The product of its digits is 5400, while the sum is 31.

The square root of 56251921 is about 7500.1280655733. The cubic root of 56251921 is about 383.1590778669.

The spelling of 56251921 in words is "fifty-six million, two hundred fifty-one thousand, nine hundred twenty-one".