243142443 has 12 divisors (see below), whose sum is σ = 352188720. Its totient is φ = 161641296.

The previous prime is 243142433. The next prime is 243142447. The reversal of 243142443 is 344241342.

It is a happy number.

It is not a de Polignac number, because 243142443 - 2¹³ = 243134251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243142447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34396 + ... + 40857.

It is an arithmetic number, because the mean of its divisors is an integer number (29349060).

Almost surely, 2^243142443 is an apocalyptic number.

243142443 is a deficient number, since it is larger than the sum of its proper divisors (109046277).

243142443 is a wasteful number, since it uses less digits than its factorization.

243142443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75618 (or 75615 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 243142443 is about 15593.0254601216. The cubic root of 243142443 is about 624.1470545306.

Adding to 243142443 its reverse (344241342), we get a palindrome (587383785).

The spelling of 243142443 in words is "two hundred forty-three million, one hundred forty-two thousand, four hundred forty-three".