221311330 has 8 divisors (see below), whose sum is σ = 398360412. Its totient is φ = 88524528.

The previous prime is 221311303. The next prime is 221311351. The reversal of 221311330 is 33113122.

221311330 is digitally balanced in base 3, 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 2 ways, for example, as 218773681 + 2537649 = 14791^2 + 1593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11065557 + ... + 11065576.

Almost surely, 2^221311330 is an apocalyptic number.

221311330 is a deficient number, since it is larger than the sum of its proper divisors (177049082).

221311330 is a wasteful number, since it uses less digits than its factorization.

221311330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22131140.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 221311330 is about 14876.5362231939. The cubic root of 221311330 is about 604.8781304055.

Adding to 221311330 its reverse (33113122), we get a palindrome (254424452).

The spelling of 221311330 in words is "two hundred twenty-one million, three hundred eleven thousand, three hundred thirty".