243244241 has 4 divisors (see below), whose sum is σ = 243966372. Its totient is φ = 242522112.

The previous prime is 243244219. The next prime is 243244247. The reversal of 243244241 is 142442342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66912400 + 176331841 = 8180^2 + 13279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243244241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243244241.

It is not an unprimeable number, because it can be changed into a prime (243244247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360560 + ... + 361233.

It is an arithmetic number, because the mean of its divisors is an integer number (60991593).

Almost surely, 2^243244241 is an apocalyptic number.

It is an amenable number.

243244241 is a deficient number, since it is larger than the sum of its proper divisors (722131).

243244241 is an equidigital number, since it uses as much as digits as its factorization.

243244241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722130.

The product of its digits is 6144, while the sum is 26.

The square root of 243244241 is about 15596.2893343256. The cubic root of 243244241 is about 624.2341475888.

Adding to 243244241 its reverse (142442342), we get a palindrome (385686583).

The spelling of 243244241 in words is "two hundred forty-three million, two hundred forty-four thousand, two hundred forty-one".