22656563 has 4 divisors (see below), whose sum is σ = 23989320. Its totient is φ = 21323808.

The previous prime is 22656553. The next prime is 22656589. The reversal of 22656563 is 36565622.

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

It is a cyclic number.

It is not a de Polignac number, because 22656563 - 2¹² = 22652467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22656503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666353 + ... + 666386.

It is an arithmetic number, because the mean of its divisors is an integer number (5997330).

Almost surely, 2^22656563 is an apocalyptic number.

22656563 is a deficient number, since it is larger than the sum of its proper divisors (1332757).

22656563 is a wasteful number, since it uses less digits than its factorization.

22656563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332756.

The product of its digits is 64800, while the sum is 35.

The square root of 22656563 is about 4759.8910701822. The cubic root of 22656563 is about 282.9641020447.

The spelling of 22656563 in words is "twenty-two million, six hundred fifty-six thousand, five hundred sixty-three".