221210330 has 16 divisors (see below), whose sum is σ = 434376864. Its totient is φ = 80440080.

The previous prime is 221210323. The next prime is 221210333. The reversal of 221210330 is 33012122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221210333) by changing a digit.

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, 1005392 + ... + 1005611.

It is an arithmetic number, because the mean of its divisors is an integer number (27148554).

Almost surely, 2^221210330 is an apocalyptic number.

221210330 is a deficient number, since it is larger than the sum of its proper divisors (213166534).

221210330 is a wasteful number, since it uses less digits than its factorization.

221210330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011021.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 221210330 is about 14873.1412284023. The cubic root of 221210330 is about 604.7861001916.

Adding to 221210330 its reverse (33012122), we get a palindrome (254222452).

The spelling of 221210330 in words is "two hundred twenty-one million, two hundred ten thousand, three hundred thirty".