56961621 has 12 divisors (see below), whose sum is σ = 82462380. Its totient is φ = 37889280.

The previous prime is 56961613. The next prime is 56961629. The reversal of 56961621 is 12616965.

56961621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56961613) and next prime (56961629).

It can be written as a sum of positive squares in 2 ways, for example, as 19580625 + 37380996 = 4425^2 + 6114^2 .

It is not a de Polignac number, because 56961621 - 2³ = 56961613 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56961629) 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, 2716 + ... + 11013.

It is an arithmetic number, because the mean of its divisors is an integer number (6871865).

Almost surely, 2^56961621 is an apocalyptic number.

It is an amenable number.

56961621 is a deficient number, since it is larger than the sum of its proper divisors (25500759).

56961621 is a wasteful number, since it uses less digits than its factorization.

56961621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14196 (or 14193 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 56961621 is about 7547.2922959165. The cubic root of 56961621 is about 384.7637185152.

The spelling of 56961621 in words is "fifty-six million, nine hundred sixty-one thousand, six hundred twenty-one".