31071995923 has 2 divisors, whose sum is σ = 31071995924. Its totient is φ = 31071995922.

The previous prime is 31071995909. The next prime is 31071995993. The reversal of 31071995923 is 32959917013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31071995923 - 2²¹ = 31069898771 is a prime.

It is not a weakly prime, because it can be changed into another prime (31071995993) 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 as a sum of consecutive naturals, namely, 15535997961 + 15535997962.

It is an arithmetic number, because the mean of its divisors is an integer number (15535997962).

Almost surely, 2^31071995923 is an apocalyptic number.

31071995923 is a deficient number, since it is larger than the sum of its proper divisors (1).

31071995923 is an equidigital number, since it uses as much as digits as its factorization.

31071995923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 459270, while the sum is 49.

The spelling of 31071995923 in words is "thirty-one billion, seventy-one million, nine hundred ninety-five thousand, nine hundred twenty-three".