31319655131 has 2 divisors, whose sum is σ = 31319655132. Its totient is φ = 31319655130.

The previous prime is 31319655097. The next prime is 31319655163. The reversal of 31319655131 is 13155691313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31319655131 - 2¹⁸ = 31319392987 is a prime.

It is a super-2 number, since 2×31319655131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31319655931) 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, 15659827565 + 15659827566.

It is an arithmetic number, because the mean of its divisors is an integer number (15659827566).

Almost surely, 2^31319655131 is an apocalyptic number.

31319655131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31319655131 is an equidigital number, since it uses as much as digits as its factorization.

31319655131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36450, while the sum is 38.

The spelling of 31319655131 in words is "thirty-one billion, three hundred nineteen million, six hundred fifty-five thousand, one hundred thirty-one".