31129312651 has 2 divisors, whose sum is σ = 31129312652. Its totient is φ = 31129312650.

The previous prime is 31129312637. The next prime is 31129312657. The reversal of 31129312651 is 15621392113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31129312651 - 2²⁹ = 30592441739 is a prime.

It is a super-2 number, since 2×31129312651² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31129312657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15564656325 + 15564656326.

It is an arithmetic number, because the mean of its divisors is an integer number (15564656326).

Almost surely, 2^31129312651 is an apocalyptic number.

31129312651 is a deficient number, since it is larger than the sum of its proper divisors (1).

31129312651 is an equidigital number, since it uses as much as digits as its factorization.

31129312651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The spelling of 31129312651 in words is "thirty-one billion, one hundred twenty-nine million, three hundred twelve thousand, six hundred fifty-one".