4243003221 has 16 divisors (see below), whose sum is σ = 5956533440. Its totient is φ = 2679143040.

The previous prime is 4243003207. The next prime is 4243003241. The reversal of 4243003221 is 1223003424.

It is not a de Polignac number, because 4243003221 - 2¹⁸ = 4242741077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243003241) 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, 360201 + ... + 371793.

It is an arithmetic number, because the mean of its divisors is an integer number (372283340).

Almost surely, 2^4243003221 is an apocalyptic number.

It is an amenable number.

4243003221 is a deficient number, since it is larger than the sum of its proper divisors (1713530219).

4243003221 is a wasteful number, since it uses less digits than its factorization.

4243003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18036.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 4243003221 is about 65138.3391022522. The cubic root of 4243003221 is about 1618.9165164024.

Adding to 4243003221 its reverse (1223003424), we get a palindrome (5466006645).

The spelling of 4243003221 in words is "four billion, two hundred forty-three million, three thousand, two hundred twenty-one".