221644050 has 48 divisors (see below), whose sum is σ = 550946880. Its totient is φ = 58968640.

The previous prime is 221644021. The next prime is 221644051. The reversal of 221644050 is 50446122.

It is a self number, because there is not a number n which added to its sum of digits gives 221644050.

It is not an unprimeable number, because it can be changed into a prime (221644051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74899 + ... + 77801.

It is an arithmetic number, because the mean of its divisors is an integer number (11478060).

Almost surely, 2^221644050 is an apocalyptic number.

221644050 is an abundant number, since it is smaller than the sum of its proper divisors (329302830).

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

221644050 is a wasteful number, since it uses less digits than its factorization.

221644050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427 (or 3422 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 221644050 is about 14887.7147339677. The cubic root of 221644050 is about 605.1811037176.

The spelling of 221644050 in words is "two hundred twenty-one million, six hundred forty-four thousand, fifty".