4423541221 has 16 divisors (see below), whose sum is σ = 5083522560. Its totient is φ = 3806855280.

The previous prime is 4423541197. The next prime is 4423541231. The reversal of 4423541221 is 1221453244.

It is a cyclic number.

It is not a de Polignac number, because 4423541221 - 2⁵ = 4423541189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4423541221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4423541231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295110 + ... + 309736.

It is an arithmetic number, because the mean of its divisors is an integer number (317720160).

Almost surely, 2^4423541221 is an apocalyptic number.

It is an amenable number.

4423541221 is a deficient number, since it is larger than the sum of its proper divisors (659981339).

4423541221 is a wasteful number, since it uses less digits than its factorization.

4423541221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16104.

The product of its digits is 7680, while the sum is 28.

The square root of 4423541221 is about 66509.7077200013. The cubic root of 4423541221 is about 1641.5597421984.

Adding to 4423541221 its reverse (1221453244), we get a palindrome (5644994465).

The spelling of 4423541221 in words is "four billion, four hundred twenty-three million, five hundred forty-one thousand, two hundred twenty-one".