4243204221 has 8 divisors (see below), whose sum is σ = 5764353120. Its totient is φ = 2775429072.

The previous prime is 4243204213. The next prime is 4243204237. The reversal of 4243204221 is 1224023424.

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

It is not a de Polignac number, because 4243204221 - 2³ = 4243204213 is a prime.

It is a super-2 number, since 2×4243204221² = 36009564122224433682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4243204191 and 4243204200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243204261) 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 7 ways as a sum of consecutive naturals, for example, 13343251 + ... + 13343568.

It is an arithmetic number, because the mean of its divisors is an integer number (720544140).

Almost surely, 2^4243204221 is an apocalyptic number.

It is an amenable number.

4243204221 is a deficient number, since it is larger than the sum of its proper divisors (1521148899).

4243204221 is a wasteful number, since it uses less digits than its factorization.

4243204221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26686875.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 4243204221 is about 65139.8819541454. The cubic root of 4243204221 is about 1618.9420798272.

Adding to 4243204221 its reverse (1224023424), we get a palindrome (5467227645).

The spelling of 4243204221 in words is "four billion, two hundred forty-three million, two hundred four thousand, two hundred twenty-one".