31223414313173 has 2 divisors, whose sum is σ = 31223414313174. Its totient is φ = 31223414313172.

The previous prime is 31223414313149. The next prime is 31223414313193. The reversal of 31223414313173 is 37131341432213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20059309052644 + 11164105260529 = 4478762^2 + 3341273^2 .

It is a cyclic number.

It is not a de Polignac number, because 31223414313173 - 2³⁰ = 31222340571349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223414313193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611707156586 + 15611707156587.

It is an arithmetic number, because the mean of its divisors is an integer number (15611707156587).

Almost surely, 2^{31223414313173} is an apocalyptic number.

It is an amenable number.

31223414313173 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223414313173 is an equidigital number, since it uses as much as digits as its factorization.

31223414313173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 38.

Adding to 31223414313173 its reverse (37131341432213), we get a palindrome (68354755745386).

The spelling of 31223414313173 in words is "thirty-one trillion, two hundred twenty-three billion, four hundred fourteen million, three hundred thirteen thousand, one hundred seventy-three".