56826721 has 12 divisors (see below), whose sum is σ = 68980032. Its totient is φ = 46589928.

The previous prime is 56826719. The next prime is 56826743. The reversal of 56826721 is 12762865.

It is a happy number.

56826721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56826721 - 2¹ = 56826719 is a prime.

It is a super-2 number, since 2×56826721² = 6458552439223682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56826761) 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 11 ways as a sum of consecutive naturals, for example, 24085 + ... + 26338.

It is an arithmetic number, because the mean of its divisors is an integer number (5748336).

Almost surely, 2^56826721 is an apocalyptic number.

It is an amenable number.

56826721 is a deficient number, since it is larger than the sum of its proper divisors (12153311).

56826721 is a wasteful number, since it uses less digits than its factorization.

56826721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50460 (or 50453 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 56826721 is about 7538.3500184059. The cubic root of 56826721 is about 384.4597380849.

It can be divided in two parts, 5682 and 6721, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 56826721 in words is "fifty-six million, eight hundred twenty-six thousand, seven hundred twenty-one".