31981415963 has 12 divisors (see below), whose sum is σ = 37854008400. Its totient is φ = 26467373856.

The previous prime is 31981415959. The next prime is 31981415987. The reversal of 31981415963 is 36951418913.

It is not a de Polignac number, because 31981415963 - 2² = 31981415959 is a prime.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31981415933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2710388 + ... + 2722161.

It is an arithmetic number, because the mean of its divisors is an integer number (3154500700).

Almost surely, 2^31981415963 is an apocalyptic number.

31981415963 is a deficient number, since it is larger than the sum of its proper divisors (5872592437).

31981415963 is an equidigital number, since it uses as much as digits as its factorization.

31981415963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5432614 (or 5432585 counting only the distinct ones).

The product of its digits is 699840, while the sum is 50.

The spelling of 31981415963 in words is "thirty-one billion, nine hundred eighty-one million, four hundred fifteen thousand, nine hundred sixty-three".