13215536563523 has 12 divisors (see below), whose sum is σ = 15788666409552. Its totient is φ = 11021451341040.

The previous prime is 13215536563513. The next prime is 13215536563549. The reversal of 13215536563523 is 32536563551231.

It is not a de Polignac number, because 13215536563523 - 2⁴ = 13215536563507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13215536563513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3644658023 + ... + 3644661648.

It is an arithmetic number, because the mean of its divisors is an integer number (1315722200796).

Almost surely, 2^{13215536563523} is an apocalyptic number.

13215536563523 is a deficient number, since it is larger than the sum of its proper divisors (2573129846029).

13215536563523 is an equidigital number, since it uses as much as digits as its factorization.

13215536563523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7289319722 (or 7289319715 counting only the distinct ones).

The product of its digits is 7290000, while the sum is 50.

The spelling of 13215536563523 in words is "thirteen trillion, two hundred fifteen billion, five hundred thirty-six million, five hundred sixty-three thousand, five hundred twenty-three".