243223 has 4 divisors (see below), whose sum is σ = 251640. Its totient is φ = 234808.

The previous prime is 243209. The next prime is 243227. The reversal of 243223 is 322342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243223 is a prime.

It is a Duffinian number.

243223 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 243197 and 243206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4165 + ... + 4222.

It is an arithmetic number, because the mean of its divisors is an integer number (62910).

2²⁴³²²³ is an apocalyptic number.

243223 is a deficient number, since it is larger than the sum of its proper divisors (8417).

243223 is an equidigital number, since it uses as much as digits as its factorization.

243223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8416.

The product of its digits is 288, while the sum is 16.

The square root of 243223 is about 493.1764390155. The cubic root of 243223 is about 62.4215976904.

Adding to 243223 its reverse (322342), we get a palindrome (565565).

The spelling of 243223 in words is "two hundred forty-three thousand, two hundred twenty-three", and thus it is an iban number.