243223345 has 4 divisors (see below), whose sum is σ = 291868020. Its totient is φ = 194578672.

The previous prime is 243223339. The next prime is 243223349. The reversal of 243223345 is 543322342.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40246336 + 202977009 = 6344^2 + 14247^2 .

It is a cyclic number.

It is not a de Polignac number, because 243223345 - 2⁷ = 243223217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243223349) 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, 24322330 + ... + 24322339.

It is an arithmetic number, because the mean of its divisors is an integer number (72967005).

Almost surely, 2^243223345 is an apocalyptic number.

It is an amenable number.

243223345 is a deficient number, since it is larger than the sum of its proper divisors (48644675).

243223345 is an equidigital number, since it uses as much as digits as its factorization.

243223345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48644674.

The product of its digits is 17280, while the sum is 28.

The square root of 243223345 is about 15595.6194170030. The cubic root of 243223345 is about 624.2162720436.

Adding to 243223345 its reverse (543322342), we get a palindrome (786545687).

The spelling of 243223345 in words is "two hundred forty-three million, two hundred twenty-three thousand, three hundred forty-five".