4420543221 has 16 divisors (see below), whose sum is σ = 6557589120. Its totient is φ = 2943142560.

The previous prime is 4420543189. The next prime is 4420543241. The reversal of 4420543221 is 1223450244.

4420543221 is a `hidden beast` number, since 4 + 4 + 205 + 432 + 21 = 666.

It is not a de Polignac number, because 4420543221 - 2⁵ = 4420543189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4420543241) 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, 87025 + ... + 128118.

It is an arithmetic number, because the mean of its divisors is an integer number (409849320).

Almost surely, 2^4420543221 is an apocalyptic number.

It is an amenable number.

4420543221 is a deficient number, since it is larger than the sum of its proper divisors (2137045899).

4420543221 is a wasteful number, since it uses less digits than its factorization.

4420543221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215913 (or 215907 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 4420543221 is about 66487.1658367237. The cubic root of 4420543221 is about 1641.1888094935.

Adding to 4420543221 its reverse (1223450244), we get a palindrome (5643993465).

The spelling of 4420543221 in words is "four billion, four hundred twenty million, five hundred forty-three thousand, two hundred twenty-one".