13431345 has 8 divisors (see below), whose sum is σ = 21490176. Its totient is φ = 7163376.

The previous prime is 13431323. The next prime is 13431349. The reversal of 13431345 is 54313431.

It is a happy number.

13431345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13431345 - 2⁷ = 13431217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13431349) 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, 447697 + ... + 447726.

It is an arithmetic number, because the mean of its divisors is an integer number (2686272).

Almost surely, 2^13431345 is an apocalyptic number.

13431345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13431345 is a deficient number, since it is larger than the sum of its proper divisors (8058831).

13431345 is an equidigital number, since it uses as much as digits as its factorization.

13431345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895431.

The product of its digits is 2160, while the sum is 24.

The square root of 13431345 is about 3664.8799434634. The cubic root of 13431345 is about 237.7058307976.

Adding to 13431345 its reverse (54313431), we get a palindrome (67744776).

The spelling of 13431345 in words is "thirteen million, four hundred thirty-one thousand, three hundred forty-five".