31320323297 has 2 divisors, whose sum is σ = 31320323298. Its totient is φ = 31320323296.

The previous prime is 31320323291. The next prime is 31320323317. The reversal of 31320323297 is 79232302313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28723809361 + 2596513936 = 169481^2 + 50956^2 .

It is an emirp because it is prime and its reverse (79232302313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31320323297 - 2¹⁰ = 31320322273 is a prime.

It is not a weakly prime, because it can be changed into another prime (31320323291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660161648 + 15660161649.

It is an arithmetic number, because the mean of its divisors is an integer number (15660161649).

Almost surely, 2^31320323297 is an apocalyptic number.

It is an amenable number.

31320323297 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320323297 is an equidigital number, since it uses as much as digits as its factorization.

31320323297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 35.

The spelling of 31320323297 in words is "thirty-one billion, three hundred twenty million, three hundred twenty-three thousand, two hundred ninety-seven".