243320033021 has 6 divisors (see below), whose sum is σ = 263476722330. Its totient is φ = 224603107248.

The previous prime is 243320032993. The next prime is 243320033059. The reversal of 243320033021 is 120330023342.

243320033021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 5165296900 + 238154736121 = 71870^2 + 488011^2 .

It is not a de Polignac number, because 243320033021 - 2⁶ = 243320032957 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 (243320033081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 719881586 + ... + 719881923.

It is an arithmetic number, because the mean of its divisors is an integer number (43912787055).

Almost surely, 2^243320033021 is an apocalyptic number.

It is an amenable number.

243320033021 is a deficient number, since it is larger than the sum of its proper divisors (20156689309).

243320033021 is a wasteful number, since it uses less digits than its factorization.

243320033021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439763535 (or 1439763522 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 243320033021 its reverse (120330023342), we get a palindrome (363650056363).

The spelling of 243320033021 in words is "two hundred forty-three billion, three hundred twenty million, thirty-three thousand, twenty-one".