31013916321 has 16 divisors (see below), whose sum is σ = 41710930560. Its totient is φ = 20497200000.

The previous prime is 31013916319. The next prime is 31013916347. The reversal of 31013916321 is 12361931013.

It is not a de Polignac number, because 31013916321 - 2¹ = 31013916319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31013916121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63196 + ... + 256946.

It is an arithmetic number, because the mean of its divisors is an integer number (2606933160).

Almost surely, 2^31013916321 is an apocalyptic number.

It is an amenable number.

31013916321 is a deficient number, since it is larger than the sum of its proper divisors (10697014239).

31013916321 is a wasteful number, since it uses less digits than its factorization.

31013916321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194216.

The product of its (nonzero) digits is 2916, while the sum is 30.

The spelling of 31013916321 in words is "thirty-one billion, thirteen million, nine hundred sixteen thousand, three hundred twenty-one".