243044201 has 2 divisors, whose sum is σ = 243044202. Its totient is φ = 243044200.

The previous prime is 243044171. The next prime is 243044203. The reversal of 243044201 is 102440342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128232976 + 114811225 = 11324^2 + 10715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243044201 is a prime.

Together with 243044203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243044203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121522100 + 121522101.

It is an arithmetic number, because the mean of its divisors is an integer number (121522101).

Almost surely, 2^243044201 is an apocalyptic number.

It is an amenable number.

243044201 is a deficient number, since it is larger than the sum of its proper divisors (1).

243044201 is an equidigital number, since it uses as much as digits as its factorization.

243044201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 243044201 is about 15589.8749513907. The cubic root of 243044201 is about 624.0629807472.

Adding to 243044201 its reverse (102440342), we get a palindrome (345484543).

The spelling of 243044201 in words is "two hundred forty-three million, forty-four thousand, two hundred one".