221044423 has 8 divisors (see below), whose sum is σ = 232854320. Its totient is φ = 209252160.

The previous prime is 221044391. The next prime is 221044451. The reversal of 221044423 is 324440122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221044423 - 2⁵ = 221044391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221044394 and 221044403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221044493) 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 7 ways as a sum of consecutive naturals, for example, 27211 + ... + 34387.

It is an arithmetic number, because the mean of its divisors is an integer number (29106790).

Almost surely, 2^221044423 is an apocalyptic number.

221044423 is a deficient number, since it is larger than the sum of its proper divisors (11809897).

221044423 is a wasteful number, since it uses less digits than its factorization.

221044423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8817.

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

The square root of 221044423 is about 14867.5627794202. The cubic root of 221044423 is about 604.6348665332.

Adding to 221044423 its reverse (324440122), we get a palindrome (545484545).

The spelling of 221044423 in words is "two hundred twenty-one million, forty-four thousand, four hundred twenty-three".