31868211623 has 4 divisors (see below), whose sum is σ = 31882003728. Its totient is φ = 31854419520.

The previous prime is 31868211619. The next prime is 31868211671. The reversal of 31868211623 is 32611286813.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31868211623 - 2² = 31868211619 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 (31868211673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6892586 + ... + 6897207.

It is an arithmetic number, because the mean of its divisors is an integer number (7970500932).

Almost surely, 2^31868211623 is an apocalyptic number.

31868211623 is a deficient number, since it is larger than the sum of its proper divisors (13792105).

31868211623 is a wasteful number, since it uses less digits than its factorization.

31868211623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13792104.

The product of its digits is 82944, while the sum is 41.

The spelling of 31868211623 in words is "thirty-one billion, eight hundred sixty-eight million, two hundred eleven thousand, six hundred twenty-three".