443040421 has 4 divisors (see below), whose sum is σ = 462303072. Its totient is φ = 423777772.

The previous prime is 443040407. The next prime is 443040427. The reversal of 443040421 is 124040344.

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 443040421 - 2⁷ = 443040293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 443040392 and 443040401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443040427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9631291 + ... + 9631336.

It is an arithmetic number, because the mean of its divisors is an integer number (115575768).

Almost surely, 2^443040421 is an apocalyptic number.

It is an amenable number.

443040421 is a deficient number, since it is larger than the sum of its proper divisors (19262651).

443040421 is a wasteful number, since it uses less digits than its factorization.

443040421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19262650.

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

The square root of 443040421 is about 21048.5253877795. The cubic root of 443040421 is about 762.3383778559.

Adding to 443040421 its reverse (124040344), we get a palindrome (567080765).

The spelling of 443040421 in words is "four hundred forty-three million, forty thousand, four hundred twenty-one".