243042229 has 2 divisors, whose sum is σ = 243042230. Its totient is φ = 243042228.

The previous prime is 243042227. The next prime is 243042257. The reversal of 243042229 is 922240342.

It is an a-pointer prime, because the next prime (243042257) can be obtained adding 243042229 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182979729 + 60062500 = 13527^2 + 7750^2 .

It is a cyclic number.

It is not a de Polignac number, because 243042229 - 2¹ = 243042227 is a prime.

Together with 243042227, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_13319047 and since 243042229 and 13319047 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 243042197 and 243042206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243042227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121521114 + 121521115.

It is an arithmetic number, because the mean of its divisors is an integer number (121521115).

Almost surely, 2^243042229 is an apocalyptic number.

It is an amenable number.

243042229 is a deficient number, since it is larger than the sum of its proper divisors (1).

243042229 is an equidigital number, since it uses as much as digits as its factorization.

243042229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 243042229 is about 15589.8117050848. The cubic root of 243042229 is about 624.0612929122.

The spelling of 243042229 in words is "two hundred forty-three million, forty-two thousand, two hundred twenty-nine".