13228231 has 4 divisors (see below), whose sum is σ = 13242672. Its totient is φ = 13213792.

The previous prime is 13228211. The next prime is 13228247. The reversal of 13228231 is 13282231.

13228231 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13282231 = 107 ⋅124133.

It is a cyclic number.

It is not a de Polignac number, because 13228231 - 2⁹ = 13227719 is a prime.

It is a super-2 number, since 2×13228231² = 349972190778722, which 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 (13228211) 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 3 ways as a sum of consecutive naturals, for example, 5746 + ... + 7711.

It is an arithmetic number, because the mean of its divisors is an integer number (3310668).

Almost surely, 2^13228231 is an apocalyptic number.

13228231 is a deficient number, since it is larger than the sum of its proper divisors (14441).

13228231 is an equidigital number, since it uses as much as digits as its factorization.

13228231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14440.

The product of its digits is 576, while the sum is 22.

The square root of 13228231 is about 3637.0635133305. The cubic root of 13228231 is about 236.5015129815.

The spelling of 13228231 in words is "thirteen million, two hundred twenty-eight thousand, two hundred thirty-one".