31138800164369 has 2 divisors, whose sum is σ = 31138800164370. Its totient is φ = 31138800164368.

The previous prime is 31138800164327. The next prime is 31138800164503. The reversal of 31138800164369 is 96346100883113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30680653936144 + 458146228225 = 5539012^2 + 676865^2 .

It is a cyclic number.

It is not a de Polignac number, because 31138800164369 - 2²⁰ = 31138799115793 is a prime.

It is a super-2 number, since 2×31138800164369² (a number of 28 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 31138800164369.

It is not a weakly prime, because it can be changed into another prime (31138800164309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15569400082184 + 15569400082185.

It is an arithmetic number, because the mean of its divisors is an integer number (15569400082185).

Almost surely, 2^{31138800164369} is an apocalyptic number.

It is an amenable number.

31138800164369 is a deficient number, since it is larger than the sum of its proper divisors (1).

31138800164369 is an equidigital number, since it uses as much as digits as its factorization.

31138800164369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 31138800164369 in words is "thirty-one trillion, one hundred thirty-eight billion, eight hundred million, one hundred sixty-four thousand, three hundred sixty-nine".