31332311317 has 2 divisors, whose sum is σ = 31332311318. Its totient is φ = 31332311316.

The previous prime is 31332311237. The next prime is 31332311333. The reversal of 31332311317 is 71311323313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26352327556 + 4979983761 = 162334^2 + 70569^2 .

It is a cyclic number.

It is not a de Polignac number, because 31332311317 - 2³¹ = 29184827669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31332311357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15666155658 + 15666155659.

It is an arithmetic number, because the mean of its divisors is an integer number (15666155659).

Almost surely, 2^31332311317 is an apocalyptic number.

It is an amenable number.

31332311317 is a deficient number, since it is larger than the sum of its proper divisors (1).

31332311317 is an equidigital number, since it uses as much as digits as its factorization.

31332311317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 28.

The spelling of 31332311317 in words is "thirty-one billion, three hundred thirty-two million, three hundred eleven thousand, three hundred seventeen".