13115503 has 4 divisors (see below), whose sum is σ = 13168008. Its totient is φ = 13063000.

The previous prime is 13115489. The next prime is 13115513. The reversal of 13115503 is 30551131.

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 13115503 - 2⁵ = 13115471 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 (13115513) 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, 25876 + ... + 26377.

It is an arithmetic number, because the mean of its divisors is an integer number (3292002).

Almost surely, 2^13115503 is an apocalyptic number.

13115503 is a deficient number, since it is larger than the sum of its proper divisors (52505).

13115503 is an equidigital number, since it uses as much as digits as its factorization.

13115503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52504.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 13115503 is about 3621.5332388368. The cubic root of 13115503 is about 235.8277913961.

Adding to 13115503 its reverse (30551131), we get a palindrome (43666634).

The spelling of 13115503 in words is "thirteen million, one hundred fifteen thousand, five hundred three".