13668231 has 4 divisors (see below), whose sum is σ = 18224312. Its totient is φ = 9112152.

The previous prime is 13668227. The next prime is 13668247. The reversal of 13668231 is 13286631.

13668231 is digitally balanced in base 2, 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.

It is not a de Polignac number, because 13668231 - 2² = 13668227 is a prime.

It is a super-2 number, since 2×13668231² = 373641077338722, 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 (13668131) 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, 2278036 + ... + 2278041.

It is an arithmetic number, because the mean of its divisors is an integer number (4556078).

Almost surely, 2^13668231 is an apocalyptic number.

13668231 is a deficient number, since it is larger than the sum of its proper divisors (4556081).

13668231 is an equidigital number, since it uses as much as digits as its factorization.

13668231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556080.

The product of its digits is 5184, while the sum is 30.

The square root of 13668231 is about 3697.0570728621. The cubic root of 13668231 is about 239.0951518561.

The spelling of 13668231 in words is "thirteen million, six hundred sixty-eight thousand, two hundred thirty-one".