22564999 has 4 divisors (see below), whose sum is σ = 22574664. Its totient is φ = 22555336.

The previous prime is 22564991. The next prime is 22565021. The reversal of 22564999 is 99946522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22564999 - 2³ = 22564991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22564991) 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, 1089 + ... + 6805.

It is an arithmetic number, because the mean of its divisors is an integer number (5643666).

Almost surely, 2^22564999 is an apocalyptic number.

22564999 is a deficient number, since it is larger than the sum of its proper divisors (9665).

22564999 is an equidigital number, since it uses as much as digits as its factorization.

22564999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9664.

The product of its digits is 349920, while the sum is 46.

The square root of 22564999 is about 4750.2630453481. The cubic root of 22564999 is about 282.5823979759.

The spelling of 22564999 in words is "twenty-two million, five hundred sixty-four thousand, nine hundred ninety-nine".