221550200 has 24 divisors (see below), whose sum is σ = 515104680. Its totient is φ = 88620000.

The previous prime is 221550187. The next prime is 221550209. The reversal of 221550200 is 2055122.

221550200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221550200² = 98168982240080000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221550209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 553676 + ... + 554075.

It is an arithmetic number, because the mean of its divisors is an integer number (21462695).

Almost surely, 2^221550200 is an apocalyptic number.

221550200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221550200 is an abundant number, since it is smaller than the sum of its proper divisors (293554480).

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

221550200 is a wasteful number, since it uses less digits than its factorization.

221550200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107767 (or 1107758 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 221550200 is about 14884.5624725754. The cubic root of 221550200 is about 605.0956750542.

The spelling of 221550200 in words is "two hundred twenty-one million, five hundred fifty thousand, two hundred".