22531224 has 32 divisors (see below), whose sum is σ = 57852720. Its totient is φ = 7307136.

The previous prime is 22531217. The next prime is 22531241. The reversal of 22531224 is 42213522.

It is a self number, because there is not a number n which added to its sum of digits gives 22531224.

It is a congruent 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, 11799 + ... + 13574.

Almost surely, 2^22531224 is an apocalyptic number.

22531224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22531224 is an abundant number, since it is smaller than the sum of its proper divisors (35321496).

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

22531224 is a wasteful number, since it uses less digits than its factorization.

22531224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25419 (or 25415 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 22531224 is about 4746.7066477717. The cubic root of 22531224 is about 282.4413390090.

Adding to 22531224 its reverse (42213522), we get a palindrome (64744746).

The spelling of 22531224 in words is "twenty-two million, five hundred thirty-one thousand, two hundred twenty-four".