243331243 has 4 divisors (see below), whose sum is σ = 243368728. Its totient is φ = 243293760.

The previous prime is 243331241. The next prime is 243331259. The reversal of 243331243 is 342133342.

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

It is a cyclic number.

It is not a de Polignac number, because 243331243 - 2¹ = 243331241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243331241) 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 3 ways as a sum of consecutive naturals, for example, 6213 + ... + 22918.

It is an arithmetic number, because the mean of its divisors is an integer number (60842182).

Almost surely, 2^243331243 is an apocalyptic number.

243331243 is a deficient number, since it is larger than the sum of its proper divisors (37485).

243331243 is an equidigital number, since it uses as much as digits as its factorization.

243331243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37484.

The product of its digits is 5184, while the sum is 25.

The square root of 243331243 is about 15599.0782740520. The cubic root of 243331243 is about 624.3085627052.

Adding to 243331243 its reverse (342133342), we get a palindrome (585464585).

The spelling of 243331243 in words is "two hundred forty-three million, three hundred thirty-one thousand, two hundred forty-three".