221988150 has 72 divisors (see below), whose sum is σ = 606260304. Its totient is φ = 58219200.

The previous prime is 221988133. The next prime is 221988163. The reversal of 221988150 is 51889122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23407 + ... + 31493.

It is an arithmetic number, because the mean of its divisors is an integer number (8420282).

Almost surely, 2^221988150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221988150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303130152).

221988150 is an abundant number, since it is smaller than the sum of its proper divisors (384272154).

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

221988150 is a wasteful number, since it uses less digits than its factorization.

221988150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8166 (or 8158 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 221988150 is about 14899.2667604819. The cubic root of 221988150 is about 605.4941208363.

The spelling of 221988150 in words is "two hundred twenty-one million, nine hundred eighty-eight thousand, one hundred fifty".