243841201 has 2 divisors, whose sum is σ = 243841202. Its totient is φ = 243841200.

The previous prime is 243841153. The next prime is 243841223. The reversal of 243841201 is 102148342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229552801 + 14288400 = 15151^2 + 3780^2 .

It is a cyclic number.

It is not a de Polignac number, because 243841201 - 2²³ = 235452593 is a prime.

It is not a weakly prime, because it can be changed into another prime (243841271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121920600 + 121920601.

It is an arithmetic number, because the mean of its divisors is an integer number (121920601).

Almost surely, 2^243841201 is an apocalyptic number.

It is an amenable number.

243841201 is a deficient number, since it is larger than the sum of its proper divisors (1).

243841201 is an equidigital number, since it uses as much as digits as its factorization.

243841201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 243841201 is about 15615.4154923908. The cubic root of 243841201 is about 624.7443869934.

Adding to 243841201 its reverse (102148342), we get a palindrome (345989543).

The spelling of 243841201 in words is "two hundred forty-three million, eight hundred forty-one thousand, two hundred one".