243326204345021 has 16 divisors (see below), whose sum is σ = 279037628757888. Its totient is φ = 207853629984000.

The previous prime is 243326204344981. The next prime is 243326204345033. The reversal of 243326204345021 is 120543402623342.

It is not a de Polignac number, because 243326204345021 - 2⁴⁶ = 172957460167357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243326204345021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243326204645021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48244400 + ... + 53048793.

It is an arithmetic number, because the mean of its divisors is an integer number (17439851797368).

Almost surely, 2^{243326204345021} is an apocalyptic number.

It is an amenable number.

243326204345021 is a deficient number, since it is larger than the sum of its proper divisors (35711424412867).

243326204345021 is a wasteful number, since it uses less digits than its factorization.

243326204345021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101294372.

The product of its (nonzero) digits is 829440, while the sum is 41.

Adding to 243326204345021 its reverse (120543402623342), we get a palindrome (363869606968363).

The spelling of 243326204345021 in words is "two hundred forty-three trillion, three hundred twenty-six billion, two hundred four million, three hundred forty-five thousand, twenty-one".