443401221 has 4 divisors (see below), whose sum is σ = 591201632. Its totient is φ = 295600812.

The previous prime is 443401219. The next prime is 443401237. The reversal of 443401221 is 122104344.

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 not a de Polignac number, because 443401221 - 2¹ = 443401219 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 (443401201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73900201 + ... + 73900206.

It is an arithmetic number, because the mean of its divisors is an integer number (147800408).

Almost surely, 2^443401221 is an apocalyptic number.

It is an amenable number.

443401221 is a deficient number, since it is larger than the sum of its proper divisors (147800411).

443401221 is a wasteful number, since it uses less digits than its factorization.

443401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147800410.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 443401221 is about 21057.0943152183. The cubic root of 443401221 is about 762.5452642125.

Adding to 443401221 its reverse (122104344), we get a palindrome (565505565).

The spelling of 443401221 in words is "four hundred forty-three million, four hundred one thousand, two hundred twenty-one".