223655 has 8 divisors (see below), whose sum is σ = 275184. Its totient is φ = 174400.

The previous prime is 223637. The next prime is 223667. The reversal of 223655 is 556322.

It is a happy number.

223655 is nontrivially palindromic in base 4.

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

It is a de Polignac number, because none of the positive numbers 2^k-223655 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 2¹³ + 6² + 3¹⁰ + 5⁷ + 5⁷ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223655.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 223655.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341 + ... + 750.

It is an arithmetic number, because the mean of its divisors is an integer number (34398).

2²²³⁶⁵⁵ is an apocalyptic number.

223655 is a deficient number, since it is larger than the sum of its proper divisors (51529).

223655 is a wasteful number, since it uses less digits than its factorization.

223655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137.

The product of its digits is 1800, while the sum is 23.

The square root of 223655 is about 472.9217694292. The cubic root of 223655 is about 60.7005841548.

Adding to 223655 its reverse (556322), we get a palindrome (779977).

It can be divided in two parts, 223 and 655, that added together give a palindrome (878).

The spelling of 223655 in words is "two hundred twenty-three thousand, six hundred fifty-five".