221204200 has 48 divisors (see below), whose sum is σ = 587774880. Its totient is φ = 75840960.

The previous prime is 221204197. The next prime is 221204209. The reversal of 221204200 is 2402122.

It is not an unprimeable number, because it can be changed into a prime (221204209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77602 + ... + 80401.

It is an arithmetic number, because the mean of its divisors is an integer number (12245310).

Almost surely, 2^221204200 is an apocalyptic number.

221204200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221204200 is an abundant number, since it is smaller than the sum of its proper divisors (366570680).

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

221204200 is a wasteful number, since it uses less digits than its factorization.

221204200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158026 (or 158017 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 221204200 is about 14872.9351508033. The cubic root of 221204200 is about 604.7805136938.

Adding to 221204200 its reverse (2402122), we get a palindrome (223606322).

The spelling of 221204200 in words is "two hundred twenty-one million, two hundred four thousand, two hundred".