31318914859 has 2 divisors, whose sum is σ = 31318914860. Its totient is φ = 31318914858.

The previous prime is 31318914857. The next prime is 31318914911. The reversal of 31318914859 is 95841981313.

It is an a-pointer prime, because the next prime (31318914911) can be obtained adding 31318914859 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31318914859 - 2¹ = 31318914857 is a prime.

Together with 31318914857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31318914857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15659457429 + 15659457430.

It is an arithmetic number, because the mean of its divisors is an integer number (15659457430).

Almost surely, 2^31318914859 is an apocalyptic number.

31318914859 is a deficient number, since it is larger than the sum of its proper divisors (1).

31318914859 is an equidigital number, since it uses as much as digits as its factorization.

31318914859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 52.

The spelling of 31318914859 in words is "thirty-one billion, three hundred eighteen million, nine hundred fourteen thousand, eight hundred fifty-nine".