243424514444221 has 16 divisors (see below), whose sum is σ = 269927607688128. Its totient is φ = 217650897475200.

The previous prime is 243424514444191. The next prime is 243424514444239. The reversal of 243424514444221 is 122444415424342.

It is a cyclic number.

It is not a de Polignac number, because 243424514444221 - 2³³ = 243415924509629 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 (243424314444221) 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, 4651335 + ... + 22549588.

It is an arithmetic number, because the mean of its divisors is an integer number (16870475480508).

Almost surely, 2^{243424514444221} is an apocalyptic number.

It is an amenable number.

243424514444221 is a deficient number, since it is larger than the sum of its proper divisors (26503093243907).

243424514444221 is a wasteful number, since it uses less digits than its factorization.

243424514444221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27214332.

The product of its digits is 3932160, while the sum is 46.

Adding to 243424514444221 its reverse (122444415424342), we get a palindrome (365868929868563).

The spelling of 243424514444221 in words is "two hundred forty-three trillion, four hundred twenty-four billion, five hundred fourteen million, four hundred forty-four thousand, two hundred twenty-one".