31312030203317 has 2 divisors, whose sum is σ = 31312030203318. Its totient is φ = 31312030203316.

The previous prime is 31312030203287. The next prime is 31312030203371. The reversal of 31312030203317 is 71330203021313.

Together with next prime (31312030203371) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25461248095396 + 5850782107921 = 5045914^2 + 2418839^2 .

It is a cyclic number.

It is not a de Polignac number, because 31312030203317 - 2⁶ = 31312030203253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31312030203317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31312030203917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656015101658 + 15656015101659.

It is an arithmetic number, because the mean of its divisors is an integer number (15656015101659).

Almost surely, 2^{31312030203317} is an apocalyptic number.

It is an amenable number.

31312030203317 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312030203317 is an equidigital number, since it uses as much as digits as its factorization.

31312030203317 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 29.

The spelling of 31312030203317 in words is "thirty-one trillion, three hundred twelve billion, thirty million, two hundred three thousand, three hundred seventeen".