243204223 has 2 divisors, whose sum is σ = 243204224. Its totient is φ = 243204222.

The previous prime is 243204217. The next prime is 243204229. The reversal of 243204223 is 322402342.

It is a balanced prime because it is at equal distance from previous prime (243204217) and next prime (243204229).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243204223 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 243204194 and 243204203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243204229) 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 as a sum of consecutive naturals, namely, 121602111 + 121602112.

It is an arithmetic number, because the mean of its divisors is an integer number (121602112).

Almost surely, 2^243204223 is an apocalyptic number.

243204223 is a deficient number, since it is larger than the sum of its proper divisors (1).

243204223 is an equidigital number, since it uses as much as digits as its factorization.

243204223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 243204223 is about 15595.0063481872. The cubic root of 243204223 is about 624.1999131748.

Adding to 243204223 its reverse (322402342), we get a palindrome (565606565).

The spelling of 243204223 in words is "two hundred forty-three million, two hundred four thousand, two hundred twenty-three".