243201271 has 2 divisors, whose sum is σ = 243201272. Its totient is φ = 243201270.

The previous prime is 243201253. The next prime is 243201367. The reversal of 243201271 is 172102342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243201271 - 2¹¹ = 243199223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243201251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121600635 + 121600636.

It is an arithmetic number, because the mean of its divisors is an integer number (121600636).

Almost surely, 2^243201271 is an apocalyptic number.

243201271 is a deficient number, since it is larger than the sum of its proper divisors (1).

243201271 is an equidigital number, since it uses as much as digits as its factorization.

243201271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 243201271 is about 15594.9117022188. The cubic root of 243201271 is about 624.1973876627.

The spelling of 243201271 in words is "two hundred forty-three million, two hundred one thousand, two hundred seventy-one".