31916223163 has 4 divisors (see below), whose sum is σ = 34817698008. Its totient is φ = 29014748320.

The previous prime is 31916223149. The next prime is 31916223191. The reversal of 31916223163 is 36132261913.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36132261913 = 11 ⋅3284751083.

It is a cyclic number.

It is not a de Polignac number, because 31916223163 - 2²⁵ = 31882668731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31916223103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1450737406 + ... + 1450737427.

It is an arithmetic number, because the mean of its divisors is an integer number (8704424502).

Almost surely, 2^31916223163 is an apocalyptic number.

31916223163 is a deficient number, since it is larger than the sum of its proper divisors (2901474845).

31916223163 is a wasteful number, since it uses less digits than its factorization.

31916223163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901474844.

The product of its digits is 34992, while the sum is 37.

The spelling of 31916223163 in words is "thirty-one billion, nine hundred sixteen million, two hundred twenty-three thousand, one hundred sixty-three".