243212303 has 2 divisors, whose sum is σ = 243212304. Its totient is φ = 243212302.

The previous prime is 243212279. The next prime is 243212309. The reversal of 243212303 is 303212342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243212303 - 2¹⁸ = 242950159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243212309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121606151 + 121606152.

It is an arithmetic number, because the mean of its divisors is an integer number (121606152).

Almost surely, 2^243212303 is an apocalyptic number.

243212303 is a deficient number, since it is larger than the sum of its proper divisors (1).

243212303 is an equidigital number, since it uses as much as digits as its factorization.

243212303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 243212303 is about 15595.2654033203. The cubic root of 243212303 is about 624.2068257184.

Adding to 243212303 its reverse (303212342), we get a palindrome (546424645).

The spelling of 243212303 in words is "two hundred forty-three million, two hundred twelve thousand, three hundred three".