13131326502 has 80 divisors (see below), whose sum is σ = 33742935072. Its totient is φ = 3738908160.

The previous prime is 13131326459. The next prime is 13131326503. The reversal of 13131326502 is 20562313131.

13131326502 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 1 + 3 + 2 + 650 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131326503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 312502 + ... + 352022.

Almost surely, 2^13131326502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13131326502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16871467536).

13131326502 is an abundant number, since it is smaller than the sum of its proper divisors (20611608570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13131326502 is a wasteful number, since it uses less digits than its factorization.

13131326502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39835 (or 39826 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 13131326502 its reverse (20562313131), we get a palindrome (33693639633).

The spelling of 13131326502 in words is "thirteen billion, one hundred thirty-one million, three hundred twenty-six thousand, five hundred two".