305223 has 4 divisors (see below), whose sum is σ = 406968. Its totient is φ = 203480.

The previous prime is 305219. The next prime is 305231. The reversal of 305223 is 322503.

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

It is a cyclic number.

It is not a de Polignac number, because 305223 - 2² = 305219 is a prime.

It is a super-2 number, since 2×305223² = 186322159458, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50868 + ... + 50873.

It is an arithmetic number, because the mean of its divisors is an integer number (101742).

2³⁰⁵²²³ is an apocalyptic number.

305223 is a deficient number, since it is larger than the sum of its proper divisors (101745).

305223 is a wasteful number, since it uses less digits than its factorization.

305223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101744.

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 305223 is about 552.4699086828. The cubic root of 305223 is about 67.3295562586.

Adding to 305223 its reverse (322503), we get a palindrome (627726).

It can be divided in two parts, 305 and 223, that added together give a triangular number (528 = T₃₂).

The spelling of 305223 in words is "three hundred five thousand, two hundred twenty-three".