13131312323 has 4 divisors (see below), whose sum is σ = 13131688200. Its totient is φ = 13130936448.

The previous prime is 13131312287. The next prime is 13131312361. The reversal of 13131312323 is 32321313131.

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 13131312323 - 2²² = 13127118019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13131312923) 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, 129473 + ... + 207426.

It is an arithmetic number, because the mean of its divisors is an integer number (3282922050).

Almost surely, 2^13131312323 is an apocalyptic number.

13131312323 is a deficient number, since it is larger than the sum of its proper divisors (375877).

13131312323 is an equidigital number, since it uses as much as digits as its factorization.

13131312323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375876.

The product of its digits is 972, while the sum is 23.

Adding to 13131312323 its reverse (32321313131), we get a palindrome (45452625454).

The spelling of 13131312323 in words is "thirteen billion, one hundred thirty-one million, three hundred twelve thousand, three hundred twenty-three".