221040200 has 24 divisors (see below), whose sum is σ = 513918930. Its totient is φ = 88416000.

The previous prime is 221040187. The next prime is 221040229. The reversal of 221040200 is 2040122.

It can be written as a sum of positive squares in 3 ways, for example, as 113337316 + 107702884 = 10646^2 + 10378^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 552401 + ... + 552800.

Almost surely, 2^221040200 is an apocalyptic number.

221040200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221040200 is an abundant number, since it is smaller than the sum of its proper divisors (292878730).

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

221040200 is a wasteful number, since it uses less digits than its factorization.

221040200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105217 (or 1105208 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 221040200 is about 14867.4207581544. The cubic root of 221040200 is about 604.6310160413.

Adding to 221040200 its reverse (2040122), we get a palindrome (223080322).

The spelling of 221040200 in words is "two hundred twenty-one million, forty thousand, two hundred".