221885 has 8 divisors (see below), whose sum is σ = 268800. Its totient is φ = 175824.

The previous prime is 221873. The next prime is 221891. The reversal of 221885 is 588122.

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 221885 - 2¹⁰ = 220861 is a prime.

It is a Curzon number.

It is a congruent number.

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, 884 + ... + 1106.

It is an arithmetic number, because the mean of its divisors is an integer number (33600).

2²²¹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

221885 is a deficient number, since it is larger than the sum of its proper divisors (46915).

221885 is a wasteful number, since it uses less digits than its factorization.

221885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427.

The product of its digits is 1280, while the sum is 26.

The square root of 221885 is about 471.0467068137. The cubic root of 221885 is about 60.5400322444.

The spelling of 221885 in words is "two hundred twenty-one thousand, eight hundred eighty-five".