13105525521503 has 4 divisors (see below), whose sum is σ = 13107780047448. Its totient is φ = 13103270995560.

The previous prime is 13105525521493. The next prime is 13105525521547. The reversal of 13105525521503 is 30512552550131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13105525521503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13105525521103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127254253 + ... + 1127265878.

It is an arithmetic number, because the mean of its divisors is an integer number (3276945011862).

Almost surely, 2^{13105525521503} is an apocalyptic number.

13105525521503 is a deficient number, since it is larger than the sum of its proper divisors (2254525945).

13105525521503 is an equidigital number, since it uses as much as digits as its factorization.

13105525521503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254525944.

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 13105525521503 in words is "thirteen trillion, one hundred five billion, five hundred twenty-five million, five hundred twenty-one thousand, five hundred three".