31131859163 has 16 divisors (see below), whose sum is σ = 32223602976. Its totient is φ = 30053928960.

The previous prime is 31131859153. The next prime is 31131859181. The reversal of 31131859163 is 36195813113.

It is a cyclic number.

It is not a de Polignac number, because 31131859163 - 2⁸ = 31131858907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31131859163.

It is not an unprimeable number, because it can be changed into a prime (31131859103) 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 15 ways as a sum of consecutive naturals, for example, 3861845 + ... + 3869897.

It is an arithmetic number, because the mean of its divisors is an integer number (2013975186).

Almost surely, 2^31131859163 is an apocalyptic number.

31131859163 is a deficient number, since it is larger than the sum of its proper divisors (1091743813).

31131859163 is a wasteful number, since it uses less digits than its factorization.

31131859163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8894.

The product of its digits is 58320, while the sum is 41.

The spelling of 31131859163 in words is "thirty-one billion, one hundred thirty-one million, eight hundred fifty-nine thousand, one hundred sixty-three".