31830230917 has 2 divisors, whose sum is σ = 31830230918. Its totient is φ = 31830230916.

The previous prime is 31830230911. The next prime is 31830230941. The reversal of 31830230917 is 71903203813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29402303841 + 2427927076 = 171471^2 + 49274^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31830230917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31830230911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15915115458 + 15915115459.

It is an arithmetic number, because the mean of its divisors is an integer number (15915115459).

Almost surely, 2^31830230917 is an apocalyptic number.

It is an amenable number.

31830230917 is a deficient number, since it is larger than the sum of its proper divisors (1).

31830230917 is an equidigital number, since it uses as much as digits as its factorization.

31830230917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 31830230917 in words is "thirty-one billion, eight hundred thirty million, two hundred thirty thousand, nine hundred seventeen".