443242021 has 8 divisors (see below), whose sum is σ = 462622104. Its totient is φ = 424270080.

The previous prime is 443241973. The next prime is 443242067. The reversal of 443242021 is 120242344.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 126900225 + 316341796 = 11265^2 + 17786^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 443242021 - 2⁹ = 443241509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 443241983 and 443242001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443242081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99816 + ... + 104161.

It is an arithmetic number, because the mean of its divisors is an integer number (57827763).

Almost surely, 2^443242021 is an apocalyptic number.

443242021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

443242021 is a deficient number, since it is larger than the sum of its proper divisors (19380083).

443242021 is a wasteful number, since it uses less digits than its factorization.

443242021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204071.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 443242021 is about 21053.3137771706. The cubic root of 443242021 is about 762.4539911682.

Adding to 443242021 its reverse (120242344), we get a palindrome (563484365).

The spelling of 443242021 in words is "four hundred forty-three million, two hundred forty-two thousand, twenty-one".