22131232232 has 32 divisors (see below), whose sum is σ = 42577443720. Its totient is φ = 10778127360.

The previous prime is 22131232223. The next prime is 22131232337. The reversal of 22131232232 is 23223213122.

It can be written as a sum of positive squares in 4 ways, for example, as 1350856516 + 20780375716 = 36754^2 + 144154^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22131232198 and 22131232207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147698 + ... + 257054.

Almost surely, 2^22131232232 is an apocalyptic number.

It is an amenable number.

22131232232 is a deficient number, since it is larger than the sum of its proper divisors (20446211488).

22131232232 is a wasteful number, since it uses less digits than its factorization.

22131232232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110021 (or 110017 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

Adding to 22131232232 its reverse (23223213122), we get a palindrome (45354445354).

The spelling of 22131232232 in words is "twenty-two billion, one hundred thirty-one million, two hundred thirty-two thousand, two hundred thirty-two".