13256310173 has 2 divisors, whose sum is σ = 13256310174. Its totient is φ = 13256310172.

The previous prime is 13256310079. The next prime is 13256310209. The reversal of 13256310173 is 37101365231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11555820004 + 1700490169 = 107498^2 + 41237^2 .

It is a cyclic number.

It is not a de Polignac number, because 13256310173 - 2⁸ = 13256309917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13256310073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6628155086 + 6628155087.

It is an arithmetic number, because the mean of its divisors is an integer number (6628155087).

Almost surely, 2^13256310173 is an apocalyptic number.

It is an amenable number.

13256310173 is a deficient number, since it is larger than the sum of its proper divisors (1).

13256310173 is an equidigital number, since it uses as much as digits as its factorization.

13256310173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The spelling of 13256310173 in words is "thirteen billion, two hundred fifty-six million, three hundred ten thousand, one hundred seventy-three".