13323131 has 4 divisors (see below), whose sum is σ = 13405032. Its totient is φ = 13241232.

The previous prime is 13323127. The next prime is 13323169. The reversal of 13323131 is 13132331.

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 13323131 - 2² = 13323127 is a prime.

It is a super-2 number, since 2×13323131² = 355011639286322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13323181) 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, 40706 + ... + 41031.

It is an arithmetic number, because the mean of its divisors is an integer number (3351258).

Almost surely, 2^13323131 is an apocalyptic number.

13323131 is a deficient number, since it is larger than the sum of its proper divisors (81901).

13323131 is an equidigital number, since it uses as much as digits as its factorization.

13323131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81900.

The product of its digits is 162, while the sum is 17.

The square root of 13323131 is about 3650.0864373327. The cubic root of 13323131 is about 237.0657238480.

Adding to 13323131 its reverse (13132331), we get a palindrome (26455462).

The spelling of 13323131 in words is "thirteen million, three hundred twenty-three thousand, one hundred thirty-one".