31320323317 has 2 divisors, whose sum is σ = 31320323318. Its totient is φ = 31320323316.

The previous prime is 31320323297. The next prime is 31320323323. The reversal of 31320323317 is 71332302313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31069702756 + 250620561 = 176266^2 + 15831^2 .

It is an emirp because it is prime and its reverse (71332302313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31320323317 - 2⁷ = 31320323189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31320323357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660161658 + 15660161659.

It is an arithmetic number, because the mean of its divisors is an integer number (15660161659).

Almost surely, 2^31320323317 is an apocalyptic number.

It is an amenable number.

31320323317 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320323317 is an equidigital number, since it uses as much as digits as its factorization.

31320323317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 28.

The spelling of 31320323317 in words is "thirty-one billion, three hundred twenty million, three hundred twenty-three thousand, three hundred seventeen".