31312133323340 has 48 divisors (see below), whose sum is σ = 65998719797472. Its totient is φ = 12478557874176.

The previous prime is 31312133323319. The next prime is 31312133323417. The reversal of 31312133323340 is 4332333121313.

It is a junction number, because it is equal to n+sod(n) for n = 31312133323297 and 31312133323306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12834422 + ... + 15078018.

It is an arithmetic number, because the mean of its divisors is an integer number (1374973329114).

Almost surely, 2^{31312133323340} is an apocalyptic number.

It is an amenable number.

31312133323340 is an abundant number, since it is smaller than the sum of its proper divisors (34686586474132).

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

31312133323340 is a wasteful number, since it uses less digits than its factorization.

31312133323340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246186 (or 2246184 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 32.

Adding to 31312133323340 its reverse (4332333121313), we get a palindrome (35644466444653).

The spelling of 31312133323340 in words is "thirty-one trillion, three hundred twelve billion, one hundred thirty-three million, three hundred twenty-three thousand, three hundred forty".