231332223 has 4 divisors (see below), whose sum is σ = 308442968. Its totient is φ = 154221480.

The previous prime is 231332197. The next prime is 231332237. The reversal of 231332223 is 322233132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 231332223 - 2¹⁷ = 231201151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231332223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231332263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38555368 + ... + 38555373.

It is an arithmetic number, because the mean of its divisors is an integer number (77110742).

Almost surely, 2^231332223 is an apocalyptic number.

231332223 is a deficient number, since it is larger than the sum of its proper divisors (77110745).

231332223 is an equidigital number, since it uses as much as digits as its factorization.

231332223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77110744.

The product of its digits is 1296, while the sum is 21.

The square root of 231332223 is about 15209.6095610637. The cubic root of 231332223 is about 613.8732518914.

Adding to 231332223 its reverse (322233132), we get a palindrome (553565355).

Subtracting 231332223 from its reverse (322233132), we obtain a palindrome (90900909).

The spelling of 231332223 in words is "two hundred thirty-one million, three hundred thirty-two thousand, two hundred twenty-three".