243355243 has 2 divisors, whose sum is σ = 243355244. Its totient is φ = 243355242.

The previous prime is 243355207. The next prime is 243355247. The reversal of 243355243 is 342553342.

243355243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243355243 - 2⁹ = 243354731 is a prime.

It is not a weakly prime, because it can be changed into another prime (243355247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121677621 + 121677622.

It is an arithmetic number, because the mean of its divisors is an integer number (121677622).

Almost surely, 2^243355243 is an apocalyptic number.

243355243 is a deficient number, since it is larger than the sum of its proper divisors (1).

243355243 is an equidigital number, since it uses as much as digits as its factorization.

243355243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 31.

The square root of 243355243 is about 15599.8475313062. The cubic root of 243355243 is about 624.3290874198.

The spelling of 243355243 in words is "two hundred forty-three million, three hundred fifty-five thousand, two hundred forty-three".