13040231 has 2 divisors, whose sum is σ = 13040232. Its totient is φ = 13040230.

The previous prime is 13040219. The next prime is 13040257. The reversal of 13040231 is 13204031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13040231 - 2¹⁴ = 13023847 is a prime.

It is a super-2 number, since 2×13040231² = 340095249066722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13040281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6520115 + 6520116.

It is an arithmetic number, because the mean of its divisors is an integer number (6520116).

Almost surely, 2^13040231 is an apocalyptic number.

13040231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13040231 is an equidigital number, since it uses as much as digits as its factorization.

13040231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13040231 is about 3611.1260016787. The cubic root of 13040231 is about 235.3757742358.

Adding to 13040231 its reverse (13204031), we get a palindrome (26244262).

The spelling of 13040231 in words is "thirteen million, forty thousand, two hundred thirty-one".