31960930561 has 12 divisors (see below), whose sum is σ = 37192910400. Its totient is φ = 27384864360.

The previous prime is 31960930549. The next prime is 31960930609. The reversal of 31960930561 is 16503906913.

It is not a de Polignac number, because 31960930561 - 2³³ = 23370995969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31960330561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12540 + ... + 253138.

It is an arithmetic number, because the mean of its divisors is an integer number (3099409200).

Almost surely, 2^31960930561 is an apocalyptic number.

It is an amenable number.

31960930561 is a deficient number, since it is larger than the sum of its proper divisors (5231979839).

31960930561 is a wasteful number, since it uses less digits than its factorization.

31960930561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243324 (or 243317 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 43.

The spelling of 31960930561 in words is "thirty-one billion, nine hundred sixty million, nine hundred thirty thousand, five hundred sixty-one".