31083312161 has 8 divisors (see below), whose sum is σ = 33978702144. Its totient is φ = 28199527920.

The previous prime is 31083312157. The next prime is 31083312163. The reversal of 31083312161 is 16121338013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31083312161 - 2² = 31083312157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31083312163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2895830 + ... + 2906543.

It is an arithmetic number, because the mean of its divisors is an integer number (4247337768).

Almost surely, 2^31083312161 is an apocalyptic number.

It is an amenable number.

31083312161 is a deficient number, since it is larger than the sum of its proper divisors (2895389983).

31083312161 is a wasteful number, since it uses less digits than its factorization.

31083312161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5802871.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 31083312161 in words is "thirty-one billion, eighty-three million, three hundred twelve thousand, one hundred sixty-one".