221331200 has 54 divisors (see below), whose sum is σ = 547845144. Its totient is φ = 88529920.

The previous prime is 221331199. The next prime is 221331251. The reversal of 221331200 is 2133122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10892 + ... + 23691.

Almost surely, 2^221331200 is an apocalyptic number.

221331200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221331200 is an abundant number, since it is smaller than the sum of its proper divisors (326513944).

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

221331200 is an equidigital number, since it uses as much as digits as its factorization.

221331200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34609 (or 34590 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 221331200 is about 14877.2040383938. The cubic root of 221331200 is about 604.8962324593.

Adding to 221331200 its reverse (2133122), we get a palindrome (223464322).

The spelling of 221331200 in words is "two hundred twenty-one million, three hundred thirty-one thousand, two hundred".