231232223 has 4 divisors (see below), whose sum is σ = 243402360. Its totient is φ = 219062088.

The previous prime is 231232217. The next prime is 231232231. The reversal of 231232223 is 322232132.

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

It is a cyclic number.

It is not a de Polignac number, because 231232223 - 2⁶ = 231232159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231232195 and 231232204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231232123) 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, 6085040 + ... + 6085077.

It is an arithmetic number, because the mean of its divisors is an integer number (60850590).

Almost surely, 2^231232223 is an apocalyptic number.

231232223 is a deficient number, since it is larger than the sum of its proper divisors (12170137).

231232223 is a wasteful number, since it uses less digits than its factorization.

231232223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12170136.

The product of its digits is 864, while the sum is 20.

The square root of 231232223 is about 15206.3218103524. The cubic root of 231232223 is about 613.7847843590.

Adding to 231232223 its reverse (322232132), we get a palindrome (553464355).

Subtracting 231232223 from its reverse (322232132), we obtain a palindrome (90999909).

The spelling of 231232223 in words is "two hundred thirty-one million, two hundred thirty-two thousand, two hundred twenty-three".