221441223 has 16 divisors (see below), whose sum is σ = 297513216. Its totient is φ = 146503680.

The previous prime is 221441197. The next prime is 221441237. The reversal of 221441223 is 322144122.

It is not a de Polignac number, because 221441223 - 2⁵ = 221441191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221441223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221448223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387528 + ... + 388098.

It is an arithmetic number, because the mean of its divisors is an integer number (18594576).

Almost surely, 2^221441223 is an apocalyptic number.

221441223 is a deficient number, since it is larger than the sum of its proper divisors (76071993).

221441223 is a wasteful number, since it uses less digits than its factorization.

221441223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334.

The product of its digits is 768, while the sum is 21.

The square root of 221441223 is about 14880.9012831885. The cubic root of 221441223 is about 604.9964464878.

Adding to 221441223 its reverse (322144122), we get a palindrome (543585345).

The spelling of 221441223 in words is "two hundred twenty-one million, four hundred forty-one thousand, two hundred twenty-three".