31940337211 has 2 divisors, whose sum is σ = 31940337212. Its totient is φ = 31940337210.

The previous prime is 31940337203. The next prime is 31940337281. The reversal of 31940337211 is 11273304913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31940337211 - 2³ = 31940337203 is a prime.

It is not a weakly prime, because it can be changed into another prime (31940337281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15970168605 + 15970168606.

It is an arithmetic number, because the mean of its divisors is an integer number (15970168606).

Almost surely, 2^31940337211 is an apocalyptic number.

31940337211 is a deficient number, since it is larger than the sum of its proper divisors (1).

31940337211 is an equidigital number, since it uses as much as digits as its factorization.

31940337211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 31940337211 in words is "thirty-one billion, nine hundred forty million, three hundred thirty-seven thousand, two hundred eleven".