31312323232 has 48 divisors (see below), whose sum is σ = 62388023040. Its totient is φ = 15468300288.

The previous prime is 31312323223. The next prime is 31312323253. The reversal of 31312323232 is 23232321313.

It is a junction number, because it is equal to n+sod(n) for n = 31312323197 and 31312323206.

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, 1875819 + ... + 1892437.

It is an arithmetic number, because the mean of its divisors is an integer number (1299750480).

Almost surely, 2^31312323232 is an apocalyptic number.

31312323232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31312323232 is a deficient number, since it is larger than the sum of its proper divisors (31075699808).

31312323232 is a wasteful number, since it uses less digits than its factorization.

31312323232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17333 (or 17325 counting only the distinct ones).

The product of its digits is 3888, while the sum is 25.

Adding to 31312323232 its reverse (23232321313), we get a palindrome (54544644545).

The spelling of 31312323232 in words is "thirty-one billion, three hundred twelve million, three hundred twenty-three thousand, two hundred thirty-two".