243024020321 has 2 divisors, whose sum is σ = 243024020322. Its totient is φ = 243024020320.

The previous prime is 243024020293. The next prime is 243024020363. The reversal of 243024020321 is 123020420342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222161395600 + 20862624721 = 471340^2 + 144439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243024020321 is a prime.

It is not a weakly prime, because it can be changed into another prime (243024020381) 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, 121512010160 + 121512010161.

It is an arithmetic number, because the mean of its divisors is an integer number (121512010161).

Almost surely, 2^243024020321 is an apocalyptic number.

It is an amenable number.

243024020321 is a deficient number, since it is larger than the sum of its proper divisors (1).

243024020321 is an equidigital number, since it uses as much as digits as its factorization.

243024020321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 243024020321 its reverse (123020420342), we get a palindrome (366044440663).

The spelling of 243024020321 in words is "two hundred forty-three billion, twenty-four million, twenty thousand, three hundred twenty-one".