31133320322197 has 2 divisors, whose sum is σ = 31133320322198. Its totient is φ = 31133320322196.

The previous prime is 31133320322179. The next prime is 31133320322243. The reversal of 31133320322197 is 79122302333113.

It is a happy number.

Together with previous prime (31133320322179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28519776032881 + 2613544289316 = 5340391^2 + 1616646^2 .

It is a cyclic number.

It is not a de Polignac number, because 31133320322197 - 2³⁵ = 31098960583829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31133320322107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566660161098 + 15566660161099.

It is an arithmetic number, because the mean of its divisors is an integer number (15566660161099).

Almost surely, 2^{31133320322197} is an apocalyptic number.

It is an amenable number.

31133320322197 is a deficient number, since it is larger than the sum of its proper divisors (1).

31133320322197 is an equidigital number, since it uses as much as digits as its factorization.

31133320322197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 40.

The spelling of 31133320322197 in words is "thirty-one trillion, one hundred thirty-three billion, three hundred twenty million, three hundred twenty-two thousand, one hundred ninety-seven".