243313243 has 4 divisors (see below), whose sum is σ = 245170728. Its totient is φ = 241455760.

The previous prime is 243313241. The next prime is 243313267. The reversal of 243313243 is 342313342.

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 243313243 - 2¹ = 243313241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243313241) 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, 928546 + ... + 928807.

It is an arithmetic number, because the mean of its divisors is an integer number (61292682).

Almost surely, 2^243313243 is an apocalyptic number.

243313243 is a deficient number, since it is larger than the sum of its proper divisors (1857485).

243313243 is a wasteful number, since it uses less digits than its factorization.

243313243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857484.

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

The square root of 243313243 is about 15598.5013062153. The cubic root of 243313243 is about 624.2931682836.

Adding to 243313243 its reverse (342313342), we get a palindrome (585626585).

Subtracting 243313243 from its reverse (342313342), we obtain a palindrome (99000099).

The spelling of 243313243 in words is "two hundred forty-three million, three hundred thirteen thousand, two hundred forty-three".