22560813 has 18 divisors (see below), whose sum is σ = 35821422. Its totient is φ = 13672560.

The previous prime is 22560803. The next prime is 22560817. The reversal of 22560813 is 31806522.

22560813 is a `hidden beast` number, since 22 + 560 + 81 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12938409 + 9622404 = 3597^2 + 3102^2 .

It is not a de Polignac number, because 22560813 - 2⁸ = 22560557 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22560817) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9270 + ... + 11447.

It is an arithmetic number, because the mean of its divisors is an integer number (1990079).

Almost surely, 2^22560813 is an apocalyptic number.

It is an amenable number.

22560813 is a deficient number, since it is larger than the sum of its proper divisors (13260609).

22560813 is a wasteful number, since it uses less digits than its factorization.

22560813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20745 (or 20731 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 22560813 is about 4749.8224177331. The cubic root of 22560813 is about 282.5649230794.

The spelling of 22560813 in words is "twenty-two million, five hundred sixty thousand, eight hundred thirteen".