243201223 has 4 divisors (see below), whose sum is σ = 246831160. Its totient is φ = 239571288.

The previous prime is 243201187. The next prime is 243201229. The reversal of 243201223 is 322102342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322102342 = 2 ⋅161051171.

It is a cyclic number.

It is not a de Polignac number, because 243201223 - 2²⁵ = 209646791 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 243201223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243201229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1814868 + ... + 1815001.

It is an arithmetic number, because the mean of its divisors is an integer number (61707790).

Almost surely, 2^243201223 is an apocalyptic number.

243201223 is a deficient number, since it is larger than the sum of its proper divisors (3629937).

243201223 is an equidigital number, since it uses as much as digits as its factorization.

243201223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629936.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 243201223 is about 15594.9101632552. The cubic root of 243201223 is about 624.1973465973.

Adding to 243201223 its reverse (322102342), we get a palindrome (565303565).

The spelling of 243201223 in words is "two hundred forty-three million, two hundred one thousand, two hundred twenty-three".