22563999 has 12 divisors (see below), whose sum is σ = 32635512. Its totient is φ = 15022800.

The previous prime is 22563997. The next prime is 22564007. The reversal of 22563999 is 99936522.

22563999 is a `hidden beast` number, since 2 + 2 + 5 + 639 + 9 + 9 = 666.

It is not a de Polignac number, because 22563999 - 2¹ = 22563997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22563991) 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, 9469 + ... + 11609.

It is an arithmetic number, because the mean of its divisors is an integer number (2719626).

Almost surely, 2^22563999 is an apocalyptic number.

22563999 is a deficient number, since it is larger than the sum of its proper divisors (10071513).

22563999 is a wasteful number, since it uses less digits than its factorization.

22563999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318 (or 3315 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 22563999 is about 4750.1577868530. The cubic root of 22563999 is about 282.5782235674.

The spelling of 22563999 in words is "twenty-two million, five hundred sixty-three thousand, nine hundred ninety-nine".