223855 has 4 divisors (see below), whose sum is σ = 268632. Its totient is φ = 179080.

The previous prime is 223849. The next prime is 223903. The reversal of 223855 is 558322.

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

It is not a de Polignac number, because 223855 - 2⁵ = 223823 is a prime.

It is a super-2 number, since 2×223855² = 100222122050, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22381 + ... + 22390.

It is an arithmetic number, because the mean of its divisors is an integer number (67158).

2²²³⁸⁵⁵ is an apocalyptic number.

223855 is a deficient number, since it is larger than the sum of its proper divisors (44777).

223855 is an equidigital number, since it uses as much as digits as its factorization.

223855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44776.

The product of its digits is 2400, while the sum is 25.

The square root of 223855 is about 473.1331736414. The cubic root of 223855 is about 60.7186722815.

The spelling of 223855 in words is "two hundred twenty-three thousand, eight hundred fifty-five".