13531052503 has 4 divisors (see below), whose sum is σ = 13539789400. Its totient is φ = 13522315608.

The previous prime is 13531052497. The next prime is 13531052531. The reversal of 13531052503 is 30525013531.

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

It is a cyclic number.

It is not a de Polignac number, because 13531052503 - 2¹⁷ = 13530921431 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 (13531052533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4366125 + ... + 4369222.

It is an arithmetic number, because the mean of its divisors is an integer number (3384947350).

Almost surely, 2^13531052503 is an apocalyptic number.

13531052503 is a deficient number, since it is larger than the sum of its proper divisors (8736897).

13531052503 is an equidigital number, since it uses as much as digits as its factorization.

13531052503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8736896.

The product of its (nonzero) digits is 6750, while the sum is 28.

The spelling of 13531052503 in words is "thirteen billion, five hundred thirty-one million, fifty-two thousand, five hundred three".