243043043 has 2 divisors, whose sum is σ = 243043044. Its totient is φ = 243043042.

The previous prime is 243043019. The next prime is 243043057. The reversal of 243043043 is 340340342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243043043 - 2⁶ = 243042979 is a prime.

It is not a weakly prime, because it can be changed into another prime (243043943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121521521 + 121521522.

It is an arithmetic number, because the mean of its divisors is an integer number (121521522).

Almost surely, 2^243043043 is an apocalyptic number.

243043043 is a deficient number, since it is larger than the sum of its proper divisors (1).

243043043 is an equidigital number, since it uses as much as digits as its factorization.

243043043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 243043043 is about 15589.8378118568. The cubic root of 243043043 is about 624.0619896160.

Adding to 243043043 its reverse (340340342), we get a palindrome (583383385).

The spelling of 243043043 in words is "two hundred forty-three million, forty-three thousand, forty-three".