13320323231 has 4 divisors (see below), whose sum is σ = 13333958112. Its totient is φ = 13306688352.

The previous prime is 13320323207. The next prime is 13320323311. The reversal of 13320323231 is 13232302331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13232302331 = 16361 ⋅808771.

It is a cyclic number.

It is not a de Polignac number, because 13320323231 - 2⁶ = 13320323167 is a prime.

It is a super-2 number, since 2×13320323231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13320323197 and 13320323206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13328323231) 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, 6815975 + ... + 6817928.

It is an arithmetic number, because the mean of its divisors is an integer number (3333489528).

Almost surely, 2^13320323231 is an apocalyptic number.

13320323231 is a deficient number, since it is larger than the sum of its proper divisors (13634881).

13320323231 is an equidigital number, since it uses as much as digits as its factorization.

13320323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13634880.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 13320323231 its reverse (13232302331), we get a palindrome (26552625562).

The spelling of 13320323231 in words is "thirteen billion, three hundred twenty million, three hundred twenty-three thousand, two hundred thirty-one".