22656565 has 4 divisors (see below), whose sum is σ = 27187884. Its totient is φ = 18125248.

The previous prime is 22656553. The next prime is 22656589. The reversal of 22656565 is 56565622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5673924 + 16982641 = 2382^2 + 4121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22656565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2265652 + ... + 2265661.

It is an arithmetic number, because the mean of its divisors is an integer number (6796971).

Almost surely, 2^22656565 is an apocalyptic number.

It is an amenable number.

22656565 is a deficient number, since it is larger than the sum of its proper divisors (4531319).

22656565 is an equidigital number, since it uses as much as digits as its factorization.

22656565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4531318.

The product of its digits is 108000, while the sum is 37.

The square root of 22656565 is about 4759.8912802710. The cubic root of 22656565 is about 282.9641103709.

The spelling of 22656565 in words is "twenty-two million, six hundred fifty-six thousand, five hundred sixty-five".