56512621 has 16 divisors (see below), whose sum is σ = 63569088. Its totient is φ = 49795200.

The previous prime is 56512609. The next prime is 56512649. The reversal of 56512621 is 12621565.

It is a cyclic number.

It is not a de Polignac number, because 56512621 - 2¹³ = 56504429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56512621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56512921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73881 + ... + 74641.

It is an arithmetic number, because the mean of its divisors is an integer number (3973068).

Almost surely, 2^56512621 is an apocalyptic number.

It is an amenable number.

56512621 is a deficient number, since it is larger than the sum of its proper divisors (7056467).

56512621 is a wasteful number, since it uses less digits than its factorization.

56512621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

The product of its digits is 3600, while the sum is 28.

The square root of 56512621 is about 7517.4876787395. The cubic root of 56512621 is about 383.7500837851.

The spelling of 56512621 in words is "fifty-six million, five hundred twelve thousand, six hundred twenty-one".