31500045315 has 32 divisors (see below), whose sum is σ = 56281536000. Its totient is φ = 16715587680.

The previous prime is 31500045293. The next prime is 31500045359. The reversal of 31500045315 is 51354000513.

It is not a de Polignac number, because 31500045315 - 2⁶ = 31500045251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 559401 + ... + 613130.

It is an arithmetic number, because the mean of its divisors is an integer number (1758798000).

Almost surely, 2^31500045315 is an apocalyptic number.

31500045315 is a deficient number, since it is larger than the sum of its proper divisors (24781490685).

31500045315 is a wasteful number, since it uses less digits than its factorization.

31500045315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172744 (or 1172738 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 31500045315 its reverse (51354000513), we get a palindrome (82854045828).

The spelling of 31500045315 in words is "thirty-one billion, five hundred million, forty-five thousand, three hundred fifteen".