31432231328 has 24 divisors (see below), whose sum is σ = 65522336292. Its totient is φ = 14791638016.

The previous prime is 31432231309. The next prime is 31432231343. The reversal of 31432231328 is 82313223413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30453042064 + 979189264 = 174508^2 + 31292^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 31432231294 and 31432231303.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28889375 + ... + 28890462.

Almost surely, 2^31432231328 is an apocalyptic number.

It is an amenable number.

31432231328 is an abundant number, since it is smaller than the sum of its proper divisors (34090104964).

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

31432231328 is a wasteful number, since it uses less digits than its factorization.

31432231328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57779864 (or 57779856 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The spelling of 31432231328 in words is "thirty-one billion, four hundred thirty-two million, two hundred thirty-one thousand, three hundred twenty-eight".