22131304 has 16 divisors (see below), whose sum is σ = 44688420. Its totient is φ = 10214400.

The previous prime is 22131289. The next prime is 22131397. The reversal of 22131304 is 40313122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22108804 + 22500 = 4702^2 + 150^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106297 + ... + 106504.

Almost surely, 2^22131304 is an apocalyptic number.

It is an amenable number.

22131304 is an abundant number, since it is smaller than the sum of its proper divisors (22557116).

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

22131304 is a wasteful number, since it uses less digits than its factorization.

22131304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212820 (or 212816 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 22131304 is about 4704.3919904702. The cubic root of 22131304 is about 280.7602806891.

Adding to 22131304 its reverse (40313122), we get a palindrome (62444426).

The spelling of 22131304 in words is "twenty-two million, one hundred thirty-one thousand, three hundred four".