221040223 has 4 divisors (see below), whose sum is σ = 221069968. Its totient is φ = 221010480.

The previous prime is 221040187. The next prime is 221040229. The reversal of 221040223 is 322040122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 322040122 = 2 ⋅161020061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221040223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221040197 and 221040206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221040229) 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 3 ways as a sum of consecutive naturals, for example, 6883 + ... + 22123.

It is an arithmetic number, because the mean of its divisors is an integer number (55267492).

Almost surely, 2^221040223 is an apocalyptic number.

221040223 is a deficient number, since it is larger than the sum of its proper divisors (29745).

221040223 is a wasteful number, since it uses less digits than its factorization.

221040223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29744.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 221040223 is about 14867.4215316577. The cubic root of 221040223 is about 604.6310370126.

Adding to 221040223 its reverse (322040122), we get a palindrome (543080345).

The spelling of 221040223 in words is "two hundred twenty-one million, forty thousand, two hundred twenty-three".