31312444432 has 40 divisors (see below), whose sum is σ = 64398585816. Its totient is φ = 14698100736.

The previous prime is 31312444393. The next prime is 31312444441. The reversal of 31312444432 is 23444421313.

It can be written as a sum of positive squares in 4 ways, for example, as 21516195856 + 9796248576 = 146684^2 + 98976^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31312444394 and 31312444403.

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, 37003 + ... + 252970.

Almost surely, 2^31312444432 is an apocalyptic number.

It is an amenable number.

31312444432 is an abundant number, since it is smaller than the sum of its proper divisors (33086141384).

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

31312444432 is a wasteful number, since it uses less digits than its factorization.

31312444432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290395 (or 290389 counting only the distinct ones).

The product of its digits is 27648, while the sum is 31.

Adding to 31312444432 its reverse (23444421313), we get a palindrome (54756865745).

The spelling of 31312444432 in words is "thirty-one billion, three hundred twelve million, four hundred forty-four thousand, four hundred thirty-two".