56721254224 has 20 divisors (see below), whose sum is σ = 114675579936. Its totient is φ = 27127556192.

The previous prime is 56721254209. The next prime is 56721254281. The reversal of 56721254224 is 42245212765.

56721254224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77066554 + ... + 77067289.

Almost surely, 2^56721254224 is an apocalyptic number.

It is an amenable number.

56721254224 is an abundant number, since it is smaller than the sum of its proper divisors (57954325712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56721254224 is a wasteful number, since it uses less digits than its factorization.

56721254224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154133874 (or 154133868 counting only the distinct ones).

The product of its digits is 268800, while the sum is 40.

Adding to 56721254224 its reverse (42245212765), we get a palindrome (98966466989).

The spelling of 56721254224 in words is "fifty-six billion, seven hundred twenty-one million, two hundred fifty-four thousand, two hundred twenty-four".