243228259 has 2 divisors, whose sum is σ = 243228260. Its totient is φ = 243228258.

The previous prime is 243228229. The next prime is 243228311. The reversal of 243228259 is 952822342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243228259 - 2¹³ = 243220067 is a prime.

It is a super-3 number, since 3×243228259³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (243228229) 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, 121614129 + 121614130.

It is an arithmetic number, because the mean of its divisors is an integer number (121614130).

Almost surely, 2^243228259 is an apocalyptic number.

243228259 is a deficient number, since it is larger than the sum of its proper divisors (1).

243228259 is an equidigital number, since it uses as much as digits as its factorization.

243228259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 37.

The square root of 243228259 is about 15595.7769604467. The cubic root of 243228259 is about 624.2204758315.

The spelling of 243228259 in words is "two hundred forty-three million, two hundred twenty-eight thousand, two hundred fifty-nine".