243302231 has 2 divisors, whose sum is σ = 243302232. Its totient is φ = 243302230.

The previous prime is 243302207. The next prime is 243302251. The reversal of 243302231 is 132203342.

It is an a-pointer prime, because the next prime (243302251) can be obtained adding 243302231 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243302231 - 2¹⁰ = 243301207 is a prime.

It is a super-2 number, since 2×243302231² = 118391951219154722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243302251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121651115 + 121651116.

It is an arithmetic number, because the mean of its divisors is an integer number (121651116).

Almost surely, 2^243302231 is an apocalyptic number.

243302231 is a deficient number, since it is larger than the sum of its proper divisors (1).

243302231 is an equidigital number, since it uses as much as digits as its factorization.

243302231 is an evil number, because the sum of its binary digits is even.

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

The square root of 243302231 is about 15598.1483195923. The cubic root of 243302231 is about 624.2837499443.

Adding to 243302231 its reverse (132203342), we get a palindrome (375505573).

The spelling of 243302231 in words is "two hundred forty-three million, three hundred two thousand, two hundred thirty-one".