443381 has 4 divisors (see below), whose sum is σ = 458700. Its totient is φ = 428064.

The previous prime is 443369. The next prime is 443389. The reversal of 443381 is 183344.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 255025 + 188356 = 505^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 443381 - 2¹⁴ = 426997 is a prime.

It is a super-2 number, since 2×443381² = 393173422322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443389) 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, 7616 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (114675).

2⁴⁴³³⁸¹ is an apocalyptic number.

It is an amenable number.

443381 is a deficient number, since it is larger than the sum of its proper divisors (15319).

443381 is a wasteful number, since it uses less digits than its factorization.

443381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15318.

The product of its digits is 1152, while the sum is 23.

The square root of 443381 is about 665.8686056573. The cubic root of 443381 is about 76.2533672257.

The spelling of 443381 in words is "four hundred forty-three thousand, three hundred eighty-one".