223306 has 4 divisors (see below), whose sum is σ = 334962. Its totient is φ = 111652.

The previous prime is 223303. The next prime is 223313. The reversal of 223306 is 603322.

223306 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 198025 + 25281 = 445^2 + 159^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 223306.

It is not an unprimeable number, because it can be changed into a prime (223303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55825 + ... + 55828.

2²²³³⁰⁶ is an apocalyptic number.

223306 is a deficient number, since it is larger than the sum of its proper divisors (111656).

223306 is a wasteful number, since it uses less digits than its factorization.

223306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111655.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 223306 is about 472.5526425701. The cubic root of 223306 is about 60.6689945302.

Adding to 223306 its sum of digits (16), we get a palindrome (223322).

Adding to 223306 its reverse (603322), we get a palindrome (826628).

It can be divided in two parts, 223 and 306, that added together give a square (529 = 23²).

The spelling of 223306 in words is "two hundred twenty-three thousand, three hundred six".