4431330221 has 4 divisors (see below), whose sum is σ = 4431753600. Its totient is φ = 4430906844.

The previous prime is 4431330193. The next prime is 4431330251. The reversal of 4431330221 is 1220331344.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4431330221 - 2¹⁰ = 4431329197 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 (4431330251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195581 + ... + 217058.

It is an arithmetic number, because the mean of its divisors is an integer number (1107938400).

Almost surely, 2^4431330221 is an apocalyptic number.

It is an amenable number.

4431330221 is a deficient number, since it is larger than the sum of its proper divisors (423379).

4431330221 is a wasteful number, since it uses less digits than its factorization.

4431330221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423378.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 4431330221 is about 66568.2373283235. The cubic root of 4431330221 is about 1642.5226669160.

Adding to 4431330221 its reverse (1220331344), we get a palindrome (5651661565).

The spelling of 4431330221 in words is "four billion, four hundred thirty-one million, three hundred thirty thousand, two hundred twenty-one".