243324243 has 20 divisors (see below), whose sum is σ = 363905080. Its totient is φ = 162028512.

The previous prime is 243324197. The next prime is 243324287. The reversal of 243324243 is 342423342.

It is a de Polignac number, because none of the positive numbers 2^k-243324243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243314243) 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 19 ways as a sum of consecutive naturals, for example, 129396 + ... + 131262.

It is an arithmetic number, because the mean of its divisors is an integer number (18195254).

Almost surely, 2^243324243 is an apocalyptic number.

243324243 is a deficient number, since it is larger than the sum of its proper divisors (120580837).

243324243 is a wasteful number, since it uses less digits than its factorization.

243324243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488 (or 3479 counting only the distinct ones).

The product of its digits is 13824, while the sum is 27.

The square root of 243324243 is about 15598.8539002069. The cubic root of 243324243 is about 624.3025760759.

Adding to 243324243 its reverse (342423342), we get a palindrome (585747585).

Subtracting 243324243 from its reverse (342423342), we obtain a palindrome (99099099).

The spelling of 243324243 in words is "two hundred forty-three million, three hundred twenty-four thousand, two hundred forty-three".