243340271 has 2 divisors, whose sum is σ = 243340272. Its totient is φ = 243340270.

The previous prime is 243340267. The next prime is 243340283. The reversal of 243340271 is 172043342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243340271 - 2² = 243340267 is a prime.

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 243340271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243340871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121670135 + 121670136.

It is an arithmetic number, because the mean of its divisors is an integer number (121670136).

Almost surely, 2^243340271 is an apocalyptic number.

243340271 is a deficient number, since it is larger than the sum of its proper divisors (1).

243340271 is an equidigital number, since it uses as much as digits as its factorization.

243340271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 243340271 is about 15599.3676474401. The cubic root of 243340271 is about 624.3162835770.

The spelling of 243340271 in words is "two hundred forty-three million, three hundred forty thousand, two hundred seventy-one".