31343393113 has 2 divisors, whose sum is σ = 31343393114. Its totient is φ = 31343393112.

The previous prime is 31343393087. The next prime is 31343393131. The reversal of 31343393113 is 31139334313.

Together with next prime (31343393131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30257558809 + 1085834304 = 173947^2 + 32952^2 .

It is a cyclic number.

It is not a de Polignac number, because 31343393113 - 2³³ = 22753458521 is a prime.

It is not a weakly prime, because it can be changed into another prime (31343393183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15671696556 + 15671696557.

It is an arithmetic number, because the mean of its divisors is an integer number (15671696557).

Almost surely, 2^31343393113 is an apocalyptic number.

It is an amenable number.

31343393113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31343393113 is an equidigital number, since it uses as much as digits as its factorization.

31343393113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 34.

The spelling of 31343393113 in words is "thirty-one billion, three hundred forty-three million, three hundred ninety-three thousand, one hundred thirteen".