22521164 has 24 divisors (see below), whose sum is σ = 40685568. Its totient is φ = 10901520.

The previous prime is 22521133. The next prime is 22521193. The reversal of 22521164 is 46112522.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21329 + ... + 22359.

It is an arithmetic number, because the mean of its divisors is an integer number (1695232).

Almost surely, 2^22521164 is an apocalyptic number.

It is an amenable number.

22521164 is a deficient number, since it is larger than the sum of its proper divisors (18164404).

22521164 is a wasteful number, since it uses less digits than its factorization.

22521164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205 (or 1203 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 22521164 is about 4745.6468473750. The cubic root of 22521164 is about 282.3992968655.

Adding to 22521164 its reverse (46112522), we get a palindrome (68633686).

The spelling of 22521164 in words is "twenty-two million, five hundred twenty-one thousand, one hundred sixty-four".