243440143 has 2 divisors, whose sum is σ = 243440144. Its totient is φ = 243440142.

The previous prime is 243440137. The next prime is 243440149. The reversal of 243440143 is 341044342.

It is a balanced prime because it is at equal distance from previous prime (243440137) and next prime (243440149).

It is a cyclic number.

It is not a de Polignac number, because 243440143 - 2⁵ = 243440111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243440149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121720071 + 121720072.

It is an arithmetic number, because the mean of its divisors is an integer number (121720072).

Almost surely, 2^243440143 is an apocalyptic number.

243440143 is a deficient number, since it is larger than the sum of its proper divisors (1).

243440143 is an equidigital number, since it uses as much as digits as its factorization.

243440143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 243440143 is about 15602.5684744532. The cubic root of 243440143 is about 624.4016827692.

Adding to 243440143 its reverse (341044342), we get a palindrome (584484485).

The spelling of 243440143 in words is "two hundred forty-three million, four hundred forty thousand, one hundred forty-three".