22212564 has 24 divisors (see below), whose sum is σ = 56541408. Its totient is φ = 6731040.

The previous prime is 22212527. The next prime is 22212569. The reversal of 22212564 is 46521222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84007 + ... + 84270.

It is an arithmetic number, because the mean of its divisors is an integer number (2355892).

Almost surely, 2^22212564 is an apocalyptic number.

It is an amenable number.

22212564 is an abundant number, since it is smaller than the sum of its proper divisors (34328844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22212564 is a wasteful number, since it uses less digits than its factorization.

22212564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168295 (or 168293 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 22212564 is about 4713.0206874148. The cubic root of 22212564 is about 281.1034855645.

Adding to 22212564 its reverse (46521222), we get a palindrome (68733786).

The spelling of 22212564 in words is "twenty-two million, two hundred twelve thousand, five hundred sixty-four".