31040340169 has 2 divisors, whose sum is σ = 31040340170. Its totient is φ = 31040340168.

The previous prime is 31040340127. The next prime is 31040340193. The reversal of 31040340169 is 96104304013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21556112400 + 9484227769 = 146820^2 + 97387^2 .

It is a cyclic number.

It is not a de Polignac number, because 31040340169 - 2¹⁷ = 31040209097 is a prime.

It is a super-2 number, since 2×31040340169² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31040340169.

It is not a weakly prime, because it can be changed into another prime (31040344169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15520170084 + 15520170085.

It is an arithmetic number, because the mean of its divisors is an integer number (15520170085).

Almost surely, 2^31040340169 is an apocalyptic number.

It is an amenable number.

31040340169 is a deficient number, since it is larger than the sum of its proper divisors (1).

31040340169 is an equidigital number, since it uses as much as digits as its factorization.

31040340169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 31040340169 in words is "thirty-one billion, forty million, three hundred forty thousand, one hundred sixty-nine".