221305050 has 36 divisors (see below), whose sum is σ = 594574110. Its totient is φ = 59014560.

The previous prime is 221305033. The next prime is 221305109. The reversal of 221305050 is 50503122.

It is a happy number.

221305050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 100942209 + 120362841 = 10047^2 + 10971^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 245445 + ... + 246344.

Almost surely, 2^221305050 is an apocalyptic number.

221305050 is an abundant number, since it is smaller than the sum of its proper divisors (373269060).

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

221305050 is a wasteful number, since it uses less digits than its factorization.

221305050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491807 (or 491799 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 221305050 is about 14876.3251510580. The cubic root of 221305050 is about 604.8724089473.

Adding to 221305050 its reverse (50503122), we get a palindrome (271808172).

The spelling of 221305050 in words is "two hundred twenty-one million, three hundred five thousand, fifty".