31112198028817 has 2 divisors, whose sum is σ = 31112198028818. Its totient is φ = 31112198028816.

The previous prime is 31112198028773. The next prime is 31112198028841. The reversal of 31112198028817 is 71882089121113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29820347561601 + 1291850467216 = 5460801^2 + 1136596^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112198028817 - 2⁷ = 31112198028689 is a prime.

It is not a weakly prime, because it can be changed into another prime (31112198028017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556099014408 + 15556099014409.

It is an arithmetic number, because the mean of its divisors is an integer number (15556099014409).

Almost surely, 2^{31112198028817} is an apocalyptic number.

It is an amenable number.

31112198028817 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112198028817 is an equidigital number, since it uses as much as digits as its factorization.

31112198028817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 52.

The spelling of 31112198028817 in words is "thirty-one trillion, one hundred twelve billion, one hundred ninety-eight million, twenty-eight thousand, eight hundred seventeen".