31132232320 has 96 divisors (see below), whose sum is σ = 86576680980. Its totient is φ = 10673897472.

The previous prime is 31132232293. The next prime is 31132232359. The reversal of 31132232320 is 2323223113.

It can be written as a sum of positive squares in 2 ways, for example, as 26683875904 + 4448356416 = 163352^2 + 66696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31132232291 and 31132232300.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 465009 + ... + 527728.

Almost surely, 2^31132232320 is an apocalyptic number.

It is an amenable number.

31132232320 is an abundant number, since it is smaller than the sum of its proper divisors (55444448660).

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

31132232320 is an equidigital number, since it uses as much as digits as its factorization.

31132232320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992770 (or 992751 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31132232320 its reverse (2323223113), we get a palindrome (33455455433).

The spelling of 31132232320 in words is "thirty-one billion, one hundred thirty-two million, two hundred thirty-two thousand, three hundred twenty".