13323444431 has 8 divisors (see below), whose sum is σ = 14654789328. Its totient is φ = 12112221000.

The previous prime is 13323444389. The next prime is 13323444443. The reversal of 13323444431 is 13444432331.

It is not a de Polignac number, because 13323444431 - 2²² = 13319250127 is a prime.

It is a super-2 number, since 2×13323444431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13323444481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5003720 + ... + 5006381.

It is an arithmetic number, because the mean of its divisors is an integer number (1831848666).

Almost surely, 2^13323444431 is an apocalyptic number.

13323444431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13323444431 is a deficient number, since it is larger than the sum of its proper divisors (1331344897).

13323444431 is an equidigital number, since it uses as much as digits as its factorization.

13323444431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010134 (or 10010112 counting only the distinct ones).

The product of its digits is 41472, while the sum is 32.

Adding to 13323444431 its reverse (13444432331), we get a palindrome (26767876762).

It can be divided in two parts, 13323 and 444431, that added together give a palindrome (457754).

The spelling of 13323444431 in words is "thirteen billion, three hundred twenty-three million, four hundred forty-four thousand, four hundred thirty-one".