243243043 has 2 divisors, whose sum is σ = 243243044. Its totient is φ = 243243042.

The previous prime is 243242999. The next prime is 243243059. The reversal of 243243043 is 340342342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243243043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243242999 and 243243017.

It is not a weakly prime, because it can be changed into another prime (243243443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121621521 + 121621522.

It is an arithmetic number, because the mean of its divisors is an integer number (121621522).

Almost surely, 2^243243043 is an apocalyptic number.

243243043 is a deficient number, since it is larger than the sum of its proper divisors (1).

243243043 is an equidigital number, since it uses as much as digits as its factorization.

243243043 is an evil number, because the sum of its binary digits is even.

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

The square root of 243243043 is about 15596.2509277070. The cubic root of 243243043 is about 624.2331227838.

Adding to 243243043 its reverse (340342342), we get a palindrome (583585385).

The spelling of 243243043 in words is "two hundred forty-three million, two hundred forty-three thousand, forty-three".