13531202403 has 4 divisors (see below), whose sum is σ = 18041603208. Its totient is φ = 9020801600.

The previous prime is 13531202383. The next prime is 13531202449. The reversal of 13531202403 is 30420213531.

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 13531202403 - 2⁹ = 13531201891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13531202453) 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, 2255200398 + ... + 2255200403.

It is an arithmetic number, because the mean of its divisors is an integer number (4510400802).

Almost surely, 2^13531202403 is an apocalyptic number.

13531202403 is a deficient number, since it is larger than the sum of its proper divisors (4510400805).

13531202403 is an equidigital number, since it uses as much as digits as its factorization.

13531202403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510400804.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 13531202403 its reverse (30420213531), we get a palindrome (43951415934).

The spelling of 13531202403 in words is "thirteen billion, five hundred thirty-one million, two hundred two thousand, four hundred three".