31347762113 has 2 divisors, whose sum is σ = 31347762114. Its totient is φ = 31347762112.

The previous prime is 31347762109. The next prime is 31347762311. The reversal of 31347762113 is 31126774313.

Together with next prime (31347762311) 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., 20496789889 + 10850972224 = 143167^2 + 104168^2 .

It is a cyclic number.

It is not a de Polignac number, because 31347762113 - 2² = 31347762109 is a prime.

It is not a weakly prime, because it can be changed into another prime (31347762613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15673881056 + 15673881057.

It is an arithmetic number, because the mean of its divisors is an integer number (15673881057).

Almost surely, 2^31347762113 is an apocalyptic number.

It is an amenable number.

31347762113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31347762113 is an equidigital number, since it uses as much as digits as its factorization.

31347762113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The spelling of 31347762113 in words is "thirty-one billion, three hundred forty-seven million, seven hundred sixty-two thousand, one hundred thirteen".