31222168861 has 16 divisors (see below), whose sum is σ = 33788276928. Its totient is φ = 28679760000.

The previous prime is 31222168843. The next prime is 31222168883. The reversal of 31222168861 is 16886122213.

It is a cyclic number.

It is not a de Polignac number, because 31222168861 - 2¹¹ = 31222166813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222168841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4261081 + ... + 4268401.

It is an arithmetic number, because the mean of its divisors is an integer number (2111767308).

Almost surely, 2^31222168861 is an apocalyptic number.

It is an amenable number.

31222168861 is a deficient number, since it is larger than the sum of its proper divisors (2566108067).

31222168861 is a wasteful number, since it uses less digits than its factorization.

31222168861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8892.

The product of its digits is 55296, while the sum is 40.

The spelling of 31222168861 in words is "thirty-one billion, two hundred twenty-two million, one hundred sixty-eight thousand, eight hundred sixty-one".