221005230 has 64 divisors (see below), whose sum is σ = 559172160. Its totient is φ = 55817216.

The previous prime is 221005223. The next prime is 221005241. The reversal of 221005230 is 32500122.

221005230 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43714 + ... + 48506.

It is an arithmetic number, because the mean of its divisors is an integer number (8737065).

Almost surely, 2^221005230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221005230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279586080).

221005230 is an abundant number, since it is smaller than the sum of its proper divisors (338166930).

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

221005230 is a wasteful number, since it uses less digits than its factorization.

221005230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4885.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 221005230 is about 14866.2446502134. The cubic root of 221005230 is about 604.5991288374.

Adding to 221005230 its reverse (32500122), we get a palindrome (253505352).

The spelling of 221005230 in words is "two hundred twenty-one million, five thousand, two hundred thirty".