31310811269 has 2 divisors, whose sum is σ = 31310811270. Its totient is φ = 31310811268.

The previous prime is 31310811253. The next prime is 31310811281. The reversal of 31310811269 is 96211801313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31150485025 + 160326244 = 176495^2 + 12662^2 .

It is a cyclic number.

It is not a de Polignac number, because 31310811269 - 2⁴ = 31310811253 is a prime.

It is a super-2 number, since 2×31310811269² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31310811229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655405634 + 15655405635.

It is an arithmetic number, because the mean of its divisors is an integer number (15655405635).

Almost surely, 2^31310811269 is an apocalyptic number.

It is an amenable number.

31310811269 is a deficient number, since it is larger than the sum of its proper divisors (1).

31310811269 is an equidigital number, since it uses as much as digits as its factorization.

31310811269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 31310811269 in words is "thirty-one billion, three hundred ten million, eight hundred eleven thousand, two hundred sixty-nine".