243434321 has 8 divisors (see below), whose sum is σ = 263610984. Its totient is φ = 223464960.

The previous prime is 243434297. The next prime is 243434329. The reversal of 243434321 is 123434342.

It can be written as a sum of positive squares in 4 ways, for example, as 13608721 + 229825600 = 3689^2 + 15160^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243434321 - 2²² = 239240017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243434329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49376 + ... + 54081.

It is an arithmetic number, because the mean of its divisors is an integer number (32951373).

Almost surely, 2^243434321 is an apocalyptic number.

It is an amenable number.

243434321 is a deficient number, since it is larger than the sum of its proper divisors (20176663).

243434321 is a wasteful number, since it uses less digits than its factorization.

243434321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103651.

The product of its digits is 6912, while the sum is 26.

The square root of 243434321 is about 15602.3819014918. The cubic root of 243434321 is about 624.3967050971.

Adding to 243434321 its reverse (123434342), we get a palindrome (366868663).

The spelling of 243434321 in words is "two hundred forty-three million, four hundred thirty-four thousand, three hundred twenty-one".