31612855867 has 2 divisors, whose sum is σ = 31612855868. Its totient is φ = 31612855866.

The previous prime is 31612855849. The next prime is 31612855871. The reversal of 31612855867 is 76855821613.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31612855867 - 2¹¹ = 31612853819 is a prime.

It is not a weakly prime, because it can be changed into another prime (31612855837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15806427933 + 15806427934.

It is an arithmetic number, because the mean of its divisors is an integer number (15806427934).

Almost surely, 2^31612855867 is an apocalyptic number.

31612855867 is a deficient number, since it is larger than the sum of its proper divisors (1).

31612855867 is an equidigital number, since it uses as much as digits as its factorization.

31612855867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 52.

The spelling of 31612855867 in words is "thirty-one billion, six hundred twelve million, eight hundred fifty-five thousand, eight hundred sixty-seven".