13243231 has 8 divisors (see below), whose sum is σ = 13837824. Its totient is φ = 12659160.

The previous prime is 13243213. The next prime is 13243253. The reversal of 13243231 is 13234231.

13243231 is a nontrivial binomial coefficient, being equal to C(5147, 2).

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

It is not a de Polignac number, because 13243231 - 2¹⁷ = 13112159 is a prime.

It is a super-2 number, since 2×13243231² = 350766334638722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13243199 and 13243208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13243201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 5146.

It is an arithmetic number, because the mean of its divisors is an integer number (1729728).

Almost surely, 2^13243231 is an apocalyptic number.

13243231 is the 5146-th triangular number.

13243231 is the 1716-th centered nonagonal number.

13243231 is a deficient number, since it is larger than the sum of its proper divisors (594593).

13243231 is an equidigital number, since it uses as much as digits as its factorization.

13243231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261.

The product of its digits is 432, while the sum is 19.

The square root of 13243231 is about 3639.1250322021. The cubic root of 13243231 is about 236.5908719353.

Adding to 13243231 its reverse (13234231), we get a palindrome (26477462).

The spelling of 13243231 in words is "thirteen million, two hundred forty-three thousand, two hundred thirty-one".