243342221249 has 2 divisors, whose sum is σ = 243342221250. Its totient is φ = 243342221248.

The previous prime is 243342221231. The next prime is 243342221273. The reversal of 243342221249 is 942122243342.

243342221249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239701305649 + 3640915600 = 489593^2 + 60340^2 .

It is a cyclic number.

It is not a de Polignac number, because 243342221249 - 2¹⁶ = 243342155713 is a prime.

It is not a weakly prime, because it can be changed into another prime (243342221299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121671110624 + 121671110625.

It is an arithmetic number, because the mean of its divisors is an integer number (121671110625).

Almost surely, 2^243342221249 is an apocalyptic number.

It is an amenable number.

243342221249 is a deficient number, since it is larger than the sum of its proper divisors (1).

243342221249 is an equidigital number, since it uses as much as digits as its factorization.

243342221249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 38.

The spelling of 243342221249 in words is "two hundred forty-three billion, three hundred forty-two million, two hundred twenty-one thousand, two hundred forty-nine".