243440242 has 16 divisors (see below), whose sum is σ = 377294400. Its totient is φ = 117715248.

The previous prime is 243440233. The next prime is 243440311. The reversal of 243440242 is 242044342.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2509 + ... + 22207.

It is an arithmetic number, because the mean of its divisors is an integer number (23580900).

Almost surely, 2^243440242 is an apocalyptic number.

243440242 is a deficient number, since it is larger than the sum of its proper divisors (133854158).

243440242 is a wasteful number, since it uses less digits than its factorization.

243440242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19905.

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 243440242 is about 15602.5716470074. The cubic root of 243440242 is about 624.4017674111.

Adding to 243440242 its reverse (242044342), we get a palindrome (485484584).

The spelling of 243440242 in words is "two hundred forty-three million, four hundred forty thousand, two hundred forty-two".