243242243 has 2 divisors, whose sum is σ = 243242244. Its totient is φ = 243242242.

The previous prime is 243242231. The next prime is 243242257. The reversal of 243242243 is 342242342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243242243 - 2⁸ = 243241987 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (243242203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121621121 + 121621122.

It is an arithmetic number, because the mean of its divisors is an integer number (121621122).

Almost surely, 2^243242243 is an apocalyptic number.

243242243 is a deficient number, since it is larger than the sum of its proper divisors (1).

243242243 is an equidigital number, since it uses as much as digits as its factorization.

243242243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 26.

The square root of 243242243 is about 15596.2252804966. The cubic root of 243242243 is about 624.2324384380.

Adding to 243242243 its reverse (342242342), we get a palindrome (585484585).

Subtracting 243242243 from its reverse (342242342), we obtain a palindrome (99000099).

The spelling of 243242243 in words is "two hundred forty-three million, two hundred forty-two thousand, two hundred forty-three".