243140243 has 2 divisors, whose sum is σ = 243140244. Its totient is φ = 243140242.

The previous prime is 243140237. The next prime is 243140251. The reversal of 243140243 is 342041342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243140243 - 2²⁰ = 242091667 is a prime.

It is not a weakly prime, because it can be changed into another prime (243140543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121570121 + 121570122.

It is an arithmetic number, because the mean of its divisors is an integer number (121570122).

Almost surely, 2^243140243 is an apocalyptic number.

243140243 is a deficient number, since it is larger than the sum of its proper divisors (1).

243140243 is an equidigital number, since it uses as much as digits as its factorization.

243140243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 243140243 is about 15592.9549156021. The cubic root of 243140243 is about 624.1451720571.

Adding to 243140243 its reverse (342041342), we get a palindrome (585181585).

The spelling of 243140243 in words is "two hundred forty-three million, one hundred forty thousand, two hundred forty-three".