221441443 has 4 divisors (see below), whose sum is σ = 226591288. Its totient is φ = 216291600.

The previous prime is 221441431. The next prime is 221441459. The reversal of 221441443 is 344144122.

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

It is a cyclic number.

It is not a de Polignac number, because 221441443 - 2¹⁷ = 221310371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221441413) 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, 2574858 + ... + 2574943.

It is an arithmetic number, because the mean of its divisors is an integer number (56647822).

Almost surely, 2^221441443 is an apocalyptic number.

221441443 is a deficient number, since it is larger than the sum of its proper divisors (5149845).

221441443 is an equidigital number, since it uses as much as digits as its factorization.

221441443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149844.

The product of its digits is 3072, while the sum is 25.

The square root of 221441443 is about 14880.9086752120. The cubic root of 221441443 is about 604.9966468407.

Adding to 221441443 its reverse (344144122), we get a palindrome (565585565).

The spelling of 221441443 in words is "two hundred twenty-one million, four hundred forty-one thousand, four hundred forty-three".