243120043 has 4 divisors (see below), whose sum is σ = 257421240. Its totient is φ = 228818848.

The previous prime is 243120041. The next prime is 243120047. The reversal of 243120043 is 340021342.

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 243120043 - 2¹ = 243120041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243120043.

It is not an unprimeable number, because it can be changed into a prime (243120041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7150573 + ... + 7150606.

It is an arithmetic number, because the mean of its divisors is an integer number (64355310).

Almost surely, 2^243120043 is an apocalyptic number.

243120043 is a deficient number, since it is larger than the sum of its proper divisors (14301197).

243120043 is a wasteful number, since it uses less digits than its factorization.

243120043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14301196.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 243120043 is about 15592.3071737315. The cubic root of 243120043 is about 624.1278869963.

Adding to 243120043 its reverse (340021342), we get a palindrome (583141385).

The spelling of 243120043 in words is "two hundred forty-three million, one hundred twenty thousand, forty-three".