223985 has 4 divisors (see below), whose sum is σ = 268788. Its totient is φ = 179184.

The previous prime is 223969. The next prime is 223999. The reversal of 223985 is 589322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 73441 + 150544 = 271^2 + 388^2 .

It is a cyclic number.

It is not a de Polignac number, because 223985 - 2⁴ = 223969 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 2¹⁷ + 9⁴ + 3³ + 8 + 5⁷ .

It is a Duffinian number.

It is a nialpdrome in base 12.

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 3 ways as a sum of consecutive naturals, for example, 22394 + ... + 22403.

It is an arithmetic number, because the mean of its divisors is an integer number (67197).

2²²³⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

223985 is a deficient number, since it is larger than the sum of its proper divisors (44803).

223985 is an equidigital number, since it uses as much as digits as its factorization.

223985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44802.

The product of its digits is 4320, while the sum is 29.

The square root of 223985 is about 473.2705357404. The cubic root of 223985 is about 60.7304237872.

The spelling of 223985 in words is "two hundred twenty-three thousand, nine hundred eighty-five".