243241344221 has 8 divisors (see below), whose sum is σ = 248908613184. Its totient is φ = 237574552320.

The previous prime is 243241344197. The next prime is 243241344253. The reversal of 243241344221 is 122443142342.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243241344221 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 (243241334221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1042685 + ... + 1254461.

It is an arithmetic number, because the mean of its divisors is an integer number (31113576648).

Almost surely, 2^243241344221 is an apocalyptic number.

It is an amenable number.

243241344221 is a deficient number, since it is larger than the sum of its proper divisors (5667268963).

243241344221 is a wasteful number, since it uses less digits than its factorization.

243241344221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238531.

The product of its digits is 36864, while the sum is 32.

Adding to 243241344221 its reverse (122443142342), we get a palindrome (365684486563).

The spelling of 243241344221 in words is "two hundred forty-three billion, two hundred forty-one million, three hundred forty-four thousand, two hundred twenty-one".