243040323 has 4 divisors (see below), whose sum is σ = 324053768. Its totient is φ = 162026880.

The previous prime is 243040321. The next prime is 243040327. The reversal of 243040323 is 323040342.

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

It is not a de Polignac number, because 243040323 - 2¹ = 243040321 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 243040323.

It is not an unprimeable number, because it can be changed into a prime (243040321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40506718 + ... + 40506723.

It is an arithmetic number, because the mean of its divisors is an integer number (81013442).

Almost surely, 2^243040323 is an apocalyptic number.

243040323 is a deficient number, since it is larger than the sum of its proper divisors (81013445).

243040323 is an equidigital number, since it uses as much as digits as its factorization.

243040323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81013444.

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 243040323 is about 15589.7505752979. The cubic root of 243040323 is about 624.0596615580.

Adding to 243040323 its reverse (323040342), we get a palindrome (566080665).

The spelling of 243040323 in words is "two hundred forty-three million, forty thousand, three hundred twenty-three".