208221104 has 80 divisors (see below), whose sum is σ = 502801152. Its totient is φ = 81333504.

The previous prime is 208221067. The next prime is 208221109. The reversal of 208221104 is 401122802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (208221109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119987 + ... + 121709.

Almost surely, 2^208221104 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 208221104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251400576).

208221104 is an abundant number, since it is smaller than the sum of its proper divisors (294580048).

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

208221104 is a wasteful number, since it uses less digits than its factorization.

208221104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834 (or 1828 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 208221104 is about 14429.8684678690. The cubic root of 208221104 is about 592.7090815572.

Adding to 208221104 its reverse (401122802), we get a palindrome (609343906).

The spelling of 208221104 in words is "two hundred eight million, two hundred twenty-one thousand, one hundred four".