31917957107 has 2 divisors, whose sum is σ = 31917957108. Its totient is φ = 31917957106.

The previous prime is 31917957091. The next prime is 31917957121. The reversal of 31917957107 is 70175971913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31917957107 - 2⁴ = 31917957091 is a prime.

It is not a weakly prime, because it can be changed into another prime (31917957157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15958978553 + 15958978554.

It is an arithmetic number, because the mean of its divisors is an integer number (15958978554).

Almost surely, 2^31917957107 is an apocalyptic number.

31917957107 is a deficient number, since it is larger than the sum of its proper divisors (1).

31917957107 is an equidigital number, since it uses as much as digits as its factorization.

31917957107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 416745, while the sum is 50.

The spelling of 31917957107 in words is "thirty-one billion, nine hundred seventeen million, nine hundred fifty-seven thousand, one hundred seven".