13016503 has 4 divisors (see below), whose sum is σ = 13029408. Its totient is φ = 13003600.

The previous prime is 13016477. The next prime is 13016513. The reversal of 13016503 is 30561031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30561031 = 41 ⋅745391.

It is a cyclic number.

It is not a de Polignac number, because 13016503 - 2⁹ = 13015991 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 (13016513) 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, 4798 + ... + 7003.

It is an arithmetic number, because the mean of its divisors is an integer number (3257352).

Almost surely, 2^13016503 is an apocalyptic number.

13016503 is a deficient number, since it is larger than the sum of its proper divisors (12905).

13016503 is a wasteful number, since it uses less digits than its factorization.

13016503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12904.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 13016503 is about 3607.8391039513. The cubic root of 13016503 is about 235.2329243306.

Adding to 13016503 its reverse (30561031), we get a palindrome (43577534).

The spelling of 13016503 in words is "thirteen million, sixteen thousand, five hundred three".