243281443 has 2 divisors, whose sum is σ = 243281444. Its totient is φ = 243281442.

The previous prime is 243281431. The next prime is 243281461. The reversal of 243281443 is 344182342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243281443 is a prime.

It is not a weakly prime, because it can be changed into another prime (243281473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121640721 + 121640722.

It is an arithmetic number, because the mean of its divisors is an integer number (121640722).

Almost surely, 2^243281443 is an apocalyptic number.

243281443 is a deficient number, since it is larger than the sum of its proper divisors (1).

243281443 is an equidigital number, since it uses as much as digits as its factorization.

243281443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 31.

The square root of 243281443 is about 15597.4819442114. The cubic root of 243281443 is about 624.2659696165.

The spelling of 243281443 in words is "two hundred forty-three million, two hundred eighty-one thousand, four hundred forty-three".