243440323 has 16 divisors (see below), whose sum is σ = 295004160. Its totient is φ = 196108416.

The previous prime is 243440321. The next prime is 243440333. The reversal of 243440323 is 323044342.

It is not a de Polignac number, because 243440323 - 2¹ = 243440321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243440321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137518 + ... + 139276.

It is an arithmetic number, because the mean of its divisors is an integer number (18437760).

Almost surely, 2^243440323 is an apocalyptic number.

243440323 is a deficient number, since it is larger than the sum of its proper divisors (51563837).

243440323 is a wasteful number, since it uses less digits than its factorization.

243440323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946.

The product of its (nonzero) digits is 6912, while the sum is 25.

The square root of 243440323 is about 15602.5742427332. The cubic root of 243440323 is about 624.4018366636.

Adding to 243440323 its reverse (323044342), we get a palindrome (566484665).

The spelling of 243440323 in words is "two hundred forty-three million, four hundred forty thousand, three hundred twenty-three".