243212223 has 16 divisors (see below), whose sum is σ = 327632256. Its totient is φ = 160476000.

The previous prime is 243212213. The next prime is 243212243. The reversal of 243212223 is 322212342.

It is not a de Polignac number, because 243212223 - 2⁵ = 243212191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243212223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243212213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129336 + ... + 131202.

It is an arithmetic number, because the mean of its divisors is an integer number (20477016).

Almost surely, 2^243212223 is an apocalyptic number.

243212223 is a deficient number, since it is larger than the sum of its proper divisors (84420033).

243212223 is a wasteful number, since it uses less digits than its factorization.

243212223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294.

The product of its digits is 1152, while the sum is 21.

The square root of 243212223 is about 15595.2628384391. The cubic root of 243212223 is about 624.2067572782.

Adding to 243212223 its reverse (322212342), we get a palindrome (565424565).

The spelling of 243212223 in words is "two hundred forty-three million, two hundred twelve thousand, two hundred twenty-three".