243044057 has 2 divisors, whose sum is σ = 243044058. Its totient is φ = 243044056.

The previous prime is 243044033. The next prime is 243044071. The reversal of 243044057 is 750440342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229946896 + 13097161 = 15164^2 + 3619^2 .

It is a cyclic number.

It is not a de Polignac number, because 243044057 - 2¹⁶ = 242978521 is a prime.

It is not a weakly prime, because it can be changed into another prime (243044017) 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 as a sum of consecutive naturals, namely, 121522028 + 121522029.

It is an arithmetic number, because the mean of its divisors is an integer number (121522029).

Almost surely, 2^243044057 is an apocalyptic number.

It is an amenable number.

243044057 is a deficient number, since it is larger than the sum of its proper divisors (1).

243044057 is an equidigital number, since it uses as much as digits as its factorization.

243044057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 243044057 is about 15589.8703330079. The cubic root of 243044057 is about 624.0628574979.

Adding to 243044057 its reverse (750440342), we get a palindrome (993484399).

The spelling of 243044057 in words is "two hundred forty-three million, forty-four thousand, fifty-seven".