243504229 has 2 divisors, whose sum is σ = 243504230. Its totient is φ = 243504228.

The previous prime is 243504223. The next prime is 243504251. The reversal of 243504229 is 922405342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205348900 + 38155329 = 14330^2 + 6177^2 .

It is a cyclic number.

It is not a de Polignac number, because 243504229 - 2¹⁹ = 242979941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243504229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243504223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121752114 + 121752115.

It is an arithmetic number, because the mean of its divisors is an integer number (121752115).

Almost surely, 2^243504229 is an apocalyptic number.

It is an amenable number.

243504229 is a deficient number, since it is larger than the sum of its proper divisors (1).

243504229 is an equidigital number, since it uses as much as digits as its factorization.

243504229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 243504229 is about 15604.6220396394. The cubic root of 243504229 is about 624.4564695364.

The spelling of 243504229 in words is "two hundred forty-three million, five hundred four thousand, two hundred twenty-nine".