243213041 has 2 divisors, whose sum is σ = 243213042. Its totient is φ = 243213040.

The previous prime is 243213037. The next prime is 243213049. The reversal of 243213041 is 140312342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179452816 + 63760225 = 13396^2 + 7985^2 .

It is a cyclic number.

It is not a de Polignac number, because 243213041 - 2² = 243213037 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243213049) 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, 121606520 + 121606521.

It is an arithmetic number, because the mean of its divisors is an integer number (121606521).

Almost surely, 2^243213041 is an apocalyptic number.

It is an amenable number.

243213041 is a deficient number, since it is larger than the sum of its proper divisors (1).

243213041 is an equidigital number, since it uses as much as digits as its factorization.

243213041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 243213041 is about 15595.2890643297. The cubic root of 243213041 is about 624.2074570793.

Adding to 243213041 its reverse (140312342), we get a palindrome (383525383).

The spelling of 243213041 in words is "two hundred forty-three million, two hundred thirteen thousand, forty-one".