306223 has 8 divisors (see below), whose sum is σ = 328320. Its totient is φ = 284760.

The previous prime is 306209. The next prime is 306239. The reversal of 306223 is 322603.

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 306223 - 2⁵ = 306191 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 306197 and 306206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306253) 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, 1236 + ... + 1462.

It is an arithmetic number, because the mean of its divisors is an integer number (41040).

2³⁰⁶²²³ is an apocalyptic number.

306223 is a deficient number, since it is larger than the sum of its proper divisors (22097).

306223 is a wasteful number, since it uses less digits than its factorization.

306223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

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

The square root of 306223 is about 553.3741952784. The cubic root of 306223 is about 67.4030065549.

Adding to 306223 its reverse (322603), we get a palindrome (628826).

It can be divided in two parts, 30622 and 3, that added together give a square (30625 = 175²).

The spelling of 306223 in words is "three hundred six thousand, two hundred twenty-three".