221223 has 8 divisors (see below), whose sum is σ = 303088. Its totient is φ = 143424.

The previous prime is 221219. The next prime is 221227. The reversal of 221223 is 322122.

221223 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (221219) and next prime (221227).

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

It is not a de Polignac number, because 221223 - 2² = 221219 is a prime.

It is a Duffinian number.

221223 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 221199 and 221208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 886 + ... + 1107.

It is an arithmetic number, because the mean of its divisors is an integer number (37886).

2²²¹²²³ is an apocalyptic number.

221223 is a deficient number, since it is larger than the sum of its proper divisors (81865).

221223 is a wasteful number, since it uses less digits than its factorization.

221223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033.

The product of its digits is 48, while the sum is 12.

The square root of 221223 is about 470.3434915038. The cubic root of 221223 is about 60.4797646508.

Adding to 221223 its reverse (322122), we get a palindrome (543345).

It can be divided in two parts, 22122 and 3, that multiplied together give a palindrome (66366).

The spelling of 221223 in words is "two hundred twenty-one thousand, two hundred twenty-three", and thus it is an iban number.