31230022322173 has 2 divisors, whose sum is σ = 31230022322174. Its totient is φ = 31230022322172.

The previous prime is 31230022322113. The next prime is 31230022322207. The reversal of 31230022322173 is 37122322003213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20965803218649 + 10264219103524 = 4578843^2 + 3203782^2 .

It is a cyclic number.

It is not a de Polignac number, because 31230022322173 - 2²¹ = 31230020225021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31230022322113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615011161086 + 15615011161087.

It is an arithmetic number, because the mean of its divisors is an integer number (15615011161087).

Almost surely, 2^{31230022322173} is an apocalyptic number.

It is an amenable number.

31230022322173 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230022322173 is an equidigital number, since it uses as much as digits as its factorization.

31230022322173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 31.

Adding to 31230022322173 its reverse (37122322003213), we get a palindrome (68352344325386).

The spelling of 31230022322173 in words is "thirty-one trillion, two hundred thirty billion, twenty-two million, three hundred twenty-two thousand, one hundred seventy-three".