243244219 has 2 divisors, whose sum is σ = 243244220. Its totient is φ = 243244218.

The previous prime is 243244217. The next prime is 243244247. The reversal of 243244219 is 912442342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243244219 - 2¹ = 243244217 is a prime.

It is a super-2 number, since 2×243244219² = 118335500153839922, which contains 22 as substring.

Together with 243244217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (243244217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121622109 + 121622110.

It is an arithmetic number, because the mean of its divisors is an integer number (121622110).

Almost surely, 2^243244219 is an apocalyptic number.

243244219 is a deficient number, since it is larger than the sum of its proper divisors (1).

243244219 is an equidigital number, since it uses as much as digits as its factorization.

243244219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 31.

The square root of 243244219 is about 15596.2886290297. The cubic root of 243244219 is about 624.2341287694.

The spelling of 243244219 in words is "two hundred forty-three million, two hundred forty-four thousand, two hundred nineteen".