13240231 has 2 divisors, whose sum is σ = 13240232. Its totient is φ = 13240230.

The previous prime is 13240223. The next prime is 13240291. The reversal of 13240231 is 13204231.

It is a happy number.

13240231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13240231 - 2³ = 13240223 is a prime.

It is a super-2 number, since 2×13240231² = 350607433866722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13240291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6620115 + 6620116.

It is an arithmetic number, because the mean of its divisors is an integer number (6620116).

Almost surely, 2^13240231 is an apocalyptic number.

13240231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13240231 is an equidigital number, since it uses as much as digits as its factorization.

13240231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13240231 is about 3638.7128218643. The cubic root of 13240231 is about 236.5730055446.

Adding to 13240231 its reverse (13204231), we get a palindrome (26444462).

The spelling of 13240231 in words is "thirteen million, two hundred forty thousand, two hundred thirty-one".