31013315616 has 48 divisors (see below), whose sum is σ = 84036089088. Its totient is φ = 10004294400.

The previous prime is 31013315561. The next prime is 31013315617. The reversal of 31013315616 is 61651331013.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (31013315617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5207595 + ... + 5213546.

It is an arithmetic number, because the mean of its divisors is an integer number (1750751856).

Almost surely, 2^31013315616 is an apocalyptic number.

It is an amenable number.

31013315616 is an abundant number, since it is smaller than the sum of its proper divisors (53022773472).

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

31013315616 is a wasteful number, since it uses less digits than its factorization.

31013315616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10421185 (or 10421177 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

Adding to 31013315616 its reverse (61651331013), we get a palindrome (92664646629).

The spelling of 31013315616 in words is "thirty-one billion, thirteen million, three hundred fifteen thousand, six hundred sixteen".