443020221 has 36 divisors (see below), whose sum is σ = 788195772. Its totient is φ = 238258944.

The previous prime is 443020217. The next prime is 443020307. The reversal of 443020221 is 122020344.

443020221 is a `hidden beast` number, since 443 + 0 + 2 + 0 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 393824025 + 49196196 = 19845^2 + 7014^2 .

It is not a de Polignac number, because 443020221 - 2² = 443020217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 443020194 and 443020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443020021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22050 + ... + 37043.

It is an arithmetic number, because the mean of its divisors is an integer number (21894327).

Almost surely, 2^443020221 is an apocalyptic number.

It is an amenable number.

443020221 is a deficient number, since it is larger than the sum of its proper divisors (345175551).

443020221 is a wasteful number, since it uses less digits than its factorization.

443020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59130 (or 59120 counting only the distinct ones).

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

The square root of 443020221 is about 21048.0455387193. The cubic root of 443020221 is about 762.3267916525.

Adding to 443020221 its reverse (122020344), we get a palindrome (565040565).

The spelling of 443020221 in words is "four hundred forty-three million, twenty thousand, two hundred twenty-one".