231040223 has 2 divisors, whose sum is σ = 231040224. Its totient is φ = 231040222.

The previous prime is 231040213. The next prime is 231040259. The reversal of 231040223 is 322040132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231040223 - 2¹⁶ = 230974687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231040213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115520111 + 115520112.

It is an arithmetic number, because the mean of its divisors is an integer number (115520112).

Almost surely, 2^231040223 is an apocalyptic number.

231040223 is a deficient number, since it is larger than the sum of its proper divisors (1).

231040223 is an equidigital number, since it uses as much as digits as its factorization.

231040223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 231040223 is about 15200.0073355245. The cubic root of 231040223 is about 613.6148551720.

Adding to 231040223 its reverse (322040132), we get a palindrome (553080355).

Subtracting 231040223 from its reverse (322040132), we obtain a palindrome (90999909).

The spelling of 231040223 in words is "two hundred thirty-one million, forty thousand, two hundred twenty-three".