221206200 has 96 divisors (see below), whose sum is σ = 709441200. Its totient is φ = 56949760.

The previous prime is 221206169. The next prime is 221206213. The reversal of 221206200 is 2602122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221206200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11044 + ... + 23756.

Almost surely, 2^221206200 is an apocalyptic number.

221206200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221206200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354720600).

221206200 is an abundant number, since it is smaller than the sum of its proper divisors (488235000).

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

221206200 is a wasteful number, since it uses less digits than its factorization.

221206200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12761 (or 12752 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221206200 is about 14873.0023868754. The cubic root of 221206200 is about 604.7823363798.

Adding to 221206200 its reverse (2602122), we get a palindrome (223808322).

The spelling of 221206200 in words is "two hundred twenty-one million, two hundred six thousand, two hundred".