243234321 has 48 divisors (see below), whose sum is σ = 369429312. Its totient is φ = 142179840.

The previous prime is 243234253. The next prime is 243234391. The reversal of 243234321 is 123432342.

It is not a de Polignac number, because 243234321 - 2¹¹ = 243232273 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243234291 and 243234300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243234391) 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 47 ways as a sum of consecutive naturals, for example, 1775365 + ... + 1775501.

It is an arithmetic number, because the mean of its divisors is an integer number (7696444).

Almost surely, 2^243234321 is an apocalyptic number.

It is an amenable number.

243234321 is a deficient number, since it is larger than the sum of its proper divisors (126194991).

243234321 is a wasteful number, since it uses less digits than its factorization.

243234321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 291 counting only the distinct ones).

The product of its digits is 3456, while the sum is 24.

The square root of 243234321 is about 15595.9713067189. The cubic root of 243234321 is about 624.2256616230.

Adding to 243234321 its reverse (123432342), we get a palindrome (366666663).

The spelling of 243234321 in words is "two hundred forty-three million, two hundred thirty-four thousand, three hundred twenty-one".