31313422431289 has 2 divisors, whose sum is σ = 31313422431290. Its totient is φ = 31313422431288.

The previous prime is 31313422431259. The next prime is 31313422431349. The reversal of 31313422431289 is 98213422431313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24815511621289 + 6497910810000 = 4981517^2 + 2549100^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313422431289 - 2¹¹ = 31313422429241 is a prime.

It is not a weakly prime, because it can be changed into another prime (31313422431259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656711215644 + 15656711215645.

It is an arithmetic number, because the mean of its divisors is an integer number (15656711215645).

Almost surely, 2^{31313422431289} is an apocalyptic number.

It is an amenable number.

31313422431289 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313422431289 is an equidigital number, since it uses as much as digits as its factorization.

31313422431289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 46.

The spelling of 31313422431289 in words is "thirty-one trillion, three hundred thirteen billion, four hundred twenty-two million, four hundred thirty-one thousand, two hundred eighty-nine".