243532241 has 2 divisors, whose sum is σ = 243532242. Its totient is φ = 243532240.

The previous prime is 243532217. The next prime is 243532319. The reversal of 243532241 is 142235342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243235216 + 297025 = 15596^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 243532241 - 2¹⁰ = 243531217 is a prime.

It is a super-3 number, since 3×243532241³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243532241.

It is not a weakly prime, because it can be changed into another prime (243532141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121766120 + 121766121.

It is an arithmetic number, because the mean of its divisors is an integer number (121766121).

Almost surely, 2^243532241 is an apocalyptic number.

It is an amenable number.

243532241 is a deficient number, since it is larger than the sum of its proper divisors (1).

243532241 is an equidigital number, since it uses as much as digits as its factorization.

243532241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 26.

The square root of 243532241 is about 15605.5195684091. The cubic root of 243532241 is about 624.4804138214.

Adding to 243532241 its reverse (142235342), we get a palindrome (385767583).

The spelling of 243532241 in words is "two hundred forty-three million, five hundred thirty-two thousand, two hundred forty-one".