2221443 has 24 divisors (see below), whose sum is σ = 3770208. Its totient is φ = 1233792.

The previous prime is 2221433. The next prime is 2221447. The reversal of 2221443 is 3441222.

2221443 is a `hidden beast` number, since 2 + 221 + 443 = 666.

It is not a de Polignac number, because 2221443 - 2⁵ = 2221411 is a prime.

2221443 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2221447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1855 + ... + 2807.

It is an arithmetic number, because the mean of its divisors is an integer number (157092).

2^2221443 is an apocalyptic number.

2221443 is a deficient number, since it is larger than the sum of its proper divisors (1548765).

2221443 is a wasteful number, since it uses less digits than its factorization.

2221443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 1000 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 2221443 is about 1490.4506030057. The cubic root of 2221443 is about 130.4803334965.

Adding to 2221443 its reverse (3441222), we get a palindrome (5662665).

It can be divided in two parts, 2 and 221443, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 2221443 in words is "two million, two hundred twenty-one thousand, four hundred forty-three".