31312355321279 has 2 divisors, whose sum is σ = 31312355321280. Its totient is φ = 31312355321278.

The previous prime is 31312355321257. The next prime is 31312355321333. The reversal of 31312355321279 is 97212355321313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31312355321279 - 2¹⁶ = 31312355255743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31312355321479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656177660639 + 15656177660640.

It is an arithmetic number, because the mean of its divisors is an integer number (15656177660640).

Almost surely, 2^{31312355321279} is an apocalyptic number.

31312355321279 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312355321279 is an equidigital number, since it uses as much as digits as its factorization.

31312355321279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 47.

The spelling of 31312355321279 in words is "thirty-one trillion, three hundred twelve billion, three hundred fifty-five million, three hundred twenty-one thousand, two hundred seventy-nine".