13115213173 has 2 divisors, whose sum is σ = 13115213174. Its totient is φ = 13115213172.

The previous prime is 13115213149. The next prime is 13115213231. The reversal of 13115213173 is 37131251131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11993097169 + 1122116004 = 109513^2 + 33498^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13115213173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13115213123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6557606586 + 6557606587.

It is an arithmetic number, because the mean of its divisors is an integer number (6557606587).

Almost surely, 2^13115213173 is an apocalyptic number.

It is an amenable number.

13115213173 is a deficient number, since it is larger than the sum of its proper divisors (1).

13115213173 is an equidigital number, since it uses as much as digits as its factorization.

13115213173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 28.

The spelling of 13115213173 in words is "thirteen billion, one hundred fifteen million, two hundred thirteen thousand, one hundred seventy-three".