56807621 has 8 divisors (see below), whose sum is σ = 61288920. Its totient is φ = 52342272.

The previous prime is 56807581. The next prime is 56807627. The reversal of 56807621 is 12670865.

It can be written as a sum of positive squares in 4 ways, for example, as 13432225 + 43375396 = 3665^2 + 6586^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56807621 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 (56807627) 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, 4025 + ... + 11393.

It is an arithmetic number, because the mean of its divisors is an integer number (7661115).

Almost surely, 2^56807621 is an apocalyptic number.

It is an amenable number.

56807621 is a deficient number, since it is larger than the sum of its proper divisors (4481299).

56807621 is a wasteful number, since it uses less digits than its factorization.

56807621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7975.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 56807621 is about 7537.0830564616. The cubic root of 56807621 is about 384.4166597365.

The spelling of 56807621 in words is "fifty-six million, eight hundred seven thousand, six hundred twenty-one".