13515542243173 has 2 divisors, whose sum is σ = 13515542243174. Its totient is φ = 13515542243172.

The previous prime is 13515542243129. The next prime is 13515542243183. The reversal of 13515542243173 is 37134224551531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13508984158849 + 6558084324 = 3675457^2 + 80982^2 .

It is a cyclic number.

It is not a de Polignac number, because 13515542243173 - 2⁹ = 13515542242661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13515542243183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6757771121586 + 6757771121587.

It is an arithmetic number, because the mean of its divisors is an integer number (6757771121587).

Almost surely, 2^{13515542243173} is an apocalyptic number.

It is an amenable number.

13515542243173 is a deficient number, since it is larger than the sum of its proper divisors (1).

13515542243173 is an equidigital number, since it uses as much as digits as its factorization.

13515542243173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512000, while the sum is 46.

The spelling of 13515542243173 in words is "thirteen trillion, five hundred fifteen billion, five hundred forty-two million, two hundred forty-three thousand, one hundred seventy-three".