243204222197 has 2 divisors, whose sum is σ = 243204222198. Its totient is φ = 243204222196.

The previous prime is 243204222143. The next prime is 243204222227. The reversal of 243204222197 is 791222402342.

It is a happy number.

243204222197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243035196196 + 169026001 = 492986^2 + 13001^2 .

It is a cyclic number.

It is not a de Polignac number, because 243204222197 - 2¹⁴ = 243204205813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243204222197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243204282197) 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, 121602111098 + 121602111099.

It is an arithmetic number, because the mean of its divisors is an integer number (121602111099).

Almost surely, 2^243204222197 is an apocalyptic number.

It is an amenable number.

243204222197 is a deficient number, since it is larger than the sum of its proper divisors (1).

243204222197 is an equidigital number, since it uses as much as digits as its factorization.

243204222197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 243204222197 in words is "two hundred forty-three billion, two hundred four million, two hundred twenty-two thousand, one hundred ninety-seven".