243135143 has 2 divisors, whose sum is σ = 243135144. Its totient is φ = 243135142.

The previous prime is 243135127. The next prime is 243135157. The reversal of 243135143 is 341531342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243135143 - 2⁴ = 243135127 is a prime.

It is a super-2 number, since 2×243135143² = 118229395523260898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243135443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121567571 + 121567572.

It is an arithmetic number, because the mean of its divisors is an integer number (121567572).

Almost surely, 2^243135143 is an apocalyptic number.

243135143 is a deficient number, since it is larger than the sum of its proper divisors (1).

243135143 is an equidigital number, since it uses as much as digits as its factorization.

243135143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 26.

The square root of 243135143 is about 15592.7913793522. The cubic root of 243135143 is about 624.1408080974.

Adding to 243135143 its reverse (341531342), we get a palindrome (584666485).

The spelling of 243135143 in words is "two hundred forty-three million, one hundred thirty-five thousand, one hundred forty-three".