243021143 has 16 divisors (see below), whose sum is σ = 256527360. Its totient is φ = 229975200.

The previous prime is 243021139. The next prime is 243021157. The reversal of 243021143 is 341120342.

It is a cyclic number.

It is not a de Polignac number, because 243021143 - 2² = 243021139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243021043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206948 + ... + 208118.

It is an arithmetic number, because the mean of its divisors is an integer number (16032960).

Almost surely, 2^243021143 is an apocalyptic number.

243021143 is a deficient number, since it is larger than the sum of its proper divisors (13506217).

243021143 is a wasteful number, since it uses less digits than its factorization.

243021143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 243021143 is about 15589.1354154103. The cubic root of 243021143 is about 624.0432448320.

Adding to 243021143 its reverse (341120342), we get a palindrome (584141485).

The spelling of 243021143 in words is "two hundred forty-three million, twenty-one thousand, one hundred forty-three".