31181297360131 has 2 divisors, whose sum is σ = 31181297360132. Its totient is φ = 31181297360130.

The previous prime is 31181297360113. The next prime is 31181297360189. The reversal of 31181297360131 is 13106379218113.

Together with previous prime (31181297360113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (13106379218113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31181297360131 - 2⁵ = 31181297360099 is a prime.

It is a super-2 number, since 2×31181297360131² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31181297360431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15590648680065 + 15590648680066.

It is an arithmetic number, because the mean of its divisors is an integer number (15590648680066).

Almost surely, 2^{31181297360131} is an apocalyptic number.

31181297360131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31181297360131 is an equidigital number, since it uses as much as digits as its factorization.

31181297360131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 31181297360131 in words is "thirty-one trillion, one hundred eighty-one billion, two hundred ninety-seven million, three hundred sixty thousand, one hundred thirty-one".