221328200 has 48 divisors (see below), whose sum is σ = 515592000. Its totient is φ = 88358720.

The previous prime is 221328193. The next prime is 221328221. The reversal of 221328200 is 2823122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167141 + ... + 168459.

It is an arithmetic number, because the mean of its divisors is an integer number (10741500).

Almost surely, 2^221328200 is an apocalyptic number.

221328200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221328200 is an abundant number, since it is smaller than the sum of its proper divisors (294263800).

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

221328200 is a wasteful number, since it uses less digits than its factorization.

221328200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174 (or 2165 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 221328200 is about 14877.1032126553. The cubic root of 221328200 is about 604.8934994557.

The spelling of 221328200 in words is "two hundred twenty-one million, three hundred twenty-eight thousand, two hundred".