31515330242312 has 32 divisors (see below), whose sum is σ = 67548567313920. Its totient is φ = 13503426744960.

The previous prime is 31515330242309. The next prime is 31515330242377. The reversal of 31515330242312 is 21324203351513.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65243864 + ... + 65725127.

It is an arithmetic number, because the mean of its divisors is an integer number (2110892728560).

Almost surely, 2^{31515330242312} is an apocalyptic number.

It is an amenable number.

31515330242312 is an abundant number, since it is smaller than the sum of its proper divisors (36033237071608).

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

31515330242312 is a wasteful number, since it uses less digits than its factorization.

31515330242312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130973301 (or 130973297 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 31515330242312 its reverse (21324203351513), we get a palindrome (52839533593825).

The spelling of 31515330242312 in words is "thirty-one trillion, five hundred fifteen billion, three hundred thirty million, two hundred forty-two thousand, three hundred twelve".