13131122523 has 4 divisors (see below), whose sum is σ = 17508163368. Its totient is φ = 8754081680.

The previous prime is 13131122519. The next prime is 13131122531. The reversal of 13131122523 is 32522113131.

It is a happy number.

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 13131122523 - 2² = 13131122519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13131122493 and 13131122502.

It is not an unprimeable number, because it can be changed into a prime (13131122573) 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, 2188520418 + ... + 2188520423.

It is an arithmetic number, because the mean of its divisors is an integer number (4377040842).

Almost surely, 2^13131122523 is an apocalyptic number.

13131122523 is a deficient number, since it is larger than the sum of its proper divisors (4377040845).

13131122523 is an equidigital number, since it uses as much as digits as its factorization.

13131122523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377040844.

The product of its digits is 1080, while the sum is 24.

Adding to 13131122523 its reverse (32522113131), we get a palindrome (45653235654).

The spelling of 13131122523 in words is "thirteen billion, one hundred thirty-one million, one hundred twenty-two thousand, five hundred twenty-three".