13131503 has 8 divisors (see below), whose sum is σ = 16371840. Its totient is φ = 10232280.

The previous prime is 13131499. The next prime is 13131509. The reversal of 13131503 is 30513131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13131503 - 2² = 13131499 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 (13131509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85193 + ... + 85346.

It is an arithmetic number, because the mean of its divisors is an integer number (2046480).

Almost surely, 2^13131503 is an apocalyptic number.

13131503 is a deficient number, since it is larger than the sum of its proper divisors (3240337).

13131503 is a wasteful number, since it uses less digits than its factorization.

13131503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170557.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 13131503 is about 3623.7415746711. The cubic root of 13131503 is about 235.9236502520.

Adding to 13131503 its reverse (30513131), we get a palindrome (43644634).

The spelling of 13131503 in words is "thirteen million, one hundred thirty-one thousand, five hundred three".