243430242 has 96 divisors (see below), whose sum is σ = 594506304. Its totient is φ = 65664000.

The previous prime is 243430241. The next prime is 243430247. The reversal of 243430242 is 242034342.

It is not an unprimeable number, because it can be changed into a prime (243430241) 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 47 ways as a sum of consecutive naturals, for example, 404742 + ... + 405342.

It is an arithmetic number, because the mean of its divisors is an integer number (6192774).

Almost surely, 2^243430242 is an apocalyptic number.

243430242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 243430242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297253152).

243430242 is an abundant number, since it is smaller than the sum of its proper divisors (351076062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243430242 is a wasteful number, since it uses less digits than its factorization.

243430242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 243430242 is about 15602.2511837235. The cubic root of 243430242 is about 624.3932176015.

Adding to 243430242 its reverse (242034342), we get a palindrome (485464584).

The spelling of 243430242 in words is "two hundred forty-three million, four hundred thirty thousand, two hundred forty-two".