221208 has 32 divisors (see below), whose sum is σ = 596400. Its totient is φ = 67968.

The previous prime is 221203. The next prime is 221209. The reversal of 221208 is 802122.

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 221208.

It is not an unprimeable number, because it can be changed into a prime (221201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43 + ... + 666.

2²²¹²⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298200).

221208 is an abundant number, since it is smaller than the sum of its proper divisors (375192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221208 is a wasteful number, since it uses less digits than its factorization.

221208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 221208 is about 470.3275454404. The cubic root of 221208 is about 60.4783976788.

The spelling of 221208 in words is "two hundred twenty-one thousand, two hundred eight".