443112421 has 4 divisors (see below), whose sum is σ = 443216512. Its totient is φ = 443008332.

The previous prime is 443112391. The next prime is 443112469. The reversal of 443112421 is 124211344.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 443112421 - 2¹³ = 443104229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 443112392 and 443112401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443112121) 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 3 ways as a sum of consecutive naturals, for example, 45375 + ... + 54268.

It is an arithmetic number, because the mean of its divisors is an integer number (110804128).

Almost surely, 2^443112421 is an apocalyptic number.

It is an amenable number.

443112421 is a deficient number, since it is larger than the sum of its proper divisors (104091).

443112421 is an equidigital number, since it uses as much as digits as its factorization.

443112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104090.

The product of its digits is 768, while the sum is 22.

The square root of 443112421 is about 21050.2356518876. The cubic root of 443112421 is about 762.3796723499.

Adding to 443112421 its reverse (124211344), we get a palindrome (567323765).

The spelling of 443112421 in words is "four hundred forty-three million, one hundred twelve thousand, four hundred twenty-one".