243147143 has 2 divisors, whose sum is σ = 243147144. Its totient is φ = 243147142.

The previous prime is 243147133. The next prime is 243147169. The reversal of 243147143 is 341741342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243147143 - 2⁴ = 243147127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243147103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121573571 + 121573572.

It is an arithmetic number, because the mean of its divisors is an integer number (121573572).

Almost surely, 2^243147143 is an apocalyptic number.

243147143 is a deficient number, since it is larger than the sum of its proper divisors (1).

243147143 is an equidigital number, since it uses as much as digits as its factorization.

243147143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 29.

The square root of 243147143 is about 15593.1761677985. The cubic root of 243147143 is about 624.1510761406.

Adding to 243147143 its reverse (341741342), we get a palindrome (584888485).

The spelling of 243147143 in words is "two hundred forty-three million, one hundred forty-seven thousand, one hundred forty-three".