243344000021 has 8 divisors (see below), whose sum is σ = 246079479360. Its totient is φ = 240615692352.

The previous prime is 243343999991. The next prime is 243344000023. The reversal of 243344000021 is 120000443342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243344000021 - 2³⁴ = 226164130837 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 (243344000023) 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 7 ways as a sum of consecutive naturals, for example, 1724660 + ... + 1860413.

It is an arithmetic number, because the mean of its divisors is an integer number (30759934920).

Almost surely, 2^243344000021 is an apocalyptic number.

It is an amenable number.

243344000021 is a deficient number, since it is larger than the sum of its proper divisors (2735479339).

243344000021 is a wasteful number, since it uses less digits than its factorization.

243344000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585835.

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

Adding to 243344000021 its reverse (120000443342), we get a palindrome (363344443363).

The spelling of 243344000021 in words is "two hundred forty-three billion, three hundred forty-four million, twenty-one", and thus it is an aban number.