221210230 has 16 divisors (see below), whose sum is σ = 398998224. Its totient is φ = 88301920.

The previous prime is 221210207. The next prime is 221210243. The reversal of 221210230 is 32012122.

It is a self number, because there is not a number n which added to its sum of digits gives 221210230.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17617 + ... + 27436.

It is an arithmetic number, because the mean of its divisors is an integer number (24937389).

Almost surely, 2^221210230 is an apocalyptic number.

221210230 is a deficient number, since it is larger than the sum of its proper divisors (177787994).

221210230 is a wasteful number, since it uses less digits than its factorization.

221210230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45551.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221210230 is about 14873.1378666373. The cubic root of 221210230 is about 604.7860090587.

Adding to 221210230 its reverse (32012122), we get a palindrome (253222352).

The spelling of 221210230 in words is "two hundred twenty-one million, two hundred ten thousand, two hundred thirty".