243043243 has 4 divisors (see below), whose sum is σ = 247162680. Its totient is φ = 238923808.

The previous prime is 243043223. The next prime is 243043249. The reversal of 243043243 is 342340342.

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 243043243 - 2⁵ = 243043211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243043249) 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 3 ways as a sum of consecutive naturals, for example, 2059630 + ... + 2059747.

It is an arithmetic number, because the mean of its divisors is an integer number (61790670).

Almost surely, 2^243043243 is an apocalyptic number.

243043243 is a deficient number, since it is larger than the sum of its proper divisors (4119437).

243043243 is an equidigital number, since it uses as much as digits as its factorization.

243043243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4119436.

The product of its (nonzero) digits is 6912, while the sum is 25.

The square root of 243043243 is about 15589.8442262904. The cubic root of 243043243 is about 624.0621607961.

Adding to 243043243 its reverse (342340342), we get a palindrome (585383585).

The spelling of 243043243 in words is "two hundred forty-three million, forty-three thousand, two hundred forty-three".