31313313193 has 2 divisors, whose sum is σ = 31313313194. Its totient is φ = 31313313192.

The previous prime is 31313313179. The next prime is 31313313203. The reversal of 31313313193 is 39131331313.

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., 29698318224 + 1614994969 = 172332^2 + 40187^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313313193 - 2²⁵ = 31279758761 is a prime.

It is not a weakly prime, because it can be changed into another prime (31313313113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656656596 + 15656656597.

It is an arithmetic number, because the mean of its divisors is an integer number (15656656597).

Almost surely, 2^31313313193 is an apocalyptic number.

It is an amenable number.

31313313193 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313313193 is an equidigital number, since it uses as much as digits as its factorization.

31313313193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6561, while the sum is 31.

The spelling of 31313313193 in words is "thirty-one billion, three hundred thirteen million, three hundred thirteen thousand, one hundred ninety-three".