4432221 has 12 divisors (see below), whose sum is σ = 6469372. Its totient is φ = 2923776.

The previous prime is 4432217. The next prime is 4432229. The reversal of 4432221 is 1222344.

4432221 is a `hidden beast` number, since 443 + 2 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3404025 + 1028196 = 1845^2 + 1014^2 .

It is not a de Polignac number, because 4432221 - 2² = 4432217 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 4432194 and 4432203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4432229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1666 + ... + 3411.

Almost surely, 2^4432221 is an apocalyptic number.

It is an amenable number.

4432221 is a deficient number, since it is larger than the sum of its proper divisors (2037151).

4432221 is a wasteful number, since it uses less digits than its factorization.

4432221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180 (or 5177 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 4432221 is about 2105.2840663435. The cubic root of 4432221 is about 164.2632718646.

Adding to 4432221 its reverse (1222344), we get a palindrome (5654565).

The spelling of 4432221 in words is "four million, four hundred thirty-two thousand, two hundred twenty-one".