231132223 has 4 divisors (see below), whose sum is σ = 264151120. Its totient is φ = 198113328.

The previous prime is 231132217. The next prime is 231132257. The reversal of 231132223 is 322231132.

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

It is not a de Polignac number, because 231132223 - 2⁵ = 231132191 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 231132223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231132203) 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 in 3 ways as a sum of consecutive naturals, for example, 16509438 + ... + 16509451.

It is an arithmetic number, because the mean of its divisors is an integer number (66037780).

Almost surely, 2^231132223 is an apocalyptic number.

231132223 is a deficient number, since it is larger than the sum of its proper divisors (33018897).

231132223 is an equidigital number, since it uses as much as digits as its factorization.

231132223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33018896.

The product of its digits is 432, while the sum is 19.

The square root of 231132223 is about 15203.0333486446. The cubic root of 231132223 is about 613.6962913168.

Adding to 231132223 its reverse (322231132), we get a palindrome (553363355).

The spelling of 231132223 in words is "two hundred thirty-one million, one hundred thirty-two thousand, two hundred twenty-three".