22131312232 has 16 divisors (see below), whose sum is σ = 43937164260. Its totient is φ = 10414735104.

The previous prime is 22131312193. The next prime is 22131312239. The reversal of 22131312232 is 23221313122.

It can be written as a sum of positive squares in 2 ways, for example, as 19450765156 + 2680547076 = 139466^2 + 51774^2 .

It is a super-2 number, since 2×22131312232² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22131312239) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 81364983 + ... + 81365254.

Almost surely, 2^22131312232 is an apocalyptic number.

It is an amenable number.

22131312232 is a deficient number, since it is larger than the sum of its proper divisors (21805852028).

22131312232 is a wasteful number, since it uses less digits than its factorization.

22131312232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162730260 (or 162730256 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 22131312232 its reverse (23221313122), we get a palindrome (45352625354).

The spelling of 22131312232 in words is "twenty-two billion, one hundred thirty-one million, three hundred twelve thousand, two hundred thirty-two".