13431229 has 4 divisors (see below), whose sum is σ = 15349984. Its totient is φ = 11512476.

The previous prime is 13431217. The next prime is 13431239. The reversal of 13431229 is 92213431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13431229 - 2¹⁵ = 13398461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431239) 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, 959367 + ... + 959380.

It is an arithmetic number, because the mean of its divisors is an integer number (3837496).

Almost surely, 2^13431229 is an apocalyptic number.

It is an amenable number.

13431229 is a deficient number, since it is larger than the sum of its proper divisors (1918755).

13431229 is an equidigital number, since it uses as much as digits as its factorization.

13431229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918754.

The product of its digits is 1296, while the sum is 25.

The square root of 13431229 is about 3664.8641175356. The cubic root of 13431229 is about 237.7051464790.

The spelling of 13431229 in words is "thirteen million, four hundred thirty-one thousand, two hundred twenty-nine".