31312955497 has 2 divisors, whose sum is σ = 31312955498. Its totient is φ = 31312955496.

The previous prime is 31312955483. The next prime is 31312955501. The reversal of 31312955497 is 79455921313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18355914256 + 12957041241 = 135484^2 + 113829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312955497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31312955497.

It is not a weakly prime, because it can be changed into another prime (31312955417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656477748 + 15656477749.

It is an arithmetic number, because the mean of its divisors is an integer number (15656477749).

Almost surely, 2^31312955497 is an apocalyptic number.

It is an amenable number.

31312955497 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312955497 is an equidigital number, since it uses as much as digits as its factorization.

31312955497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 49.

The spelling of 31312955497 in words is "thirty-one billion, three hundred twelve million, nine hundred fifty-five thousand, four hundred ninety-seven".