221330 has 8 divisors (see below), whose sum is σ = 398412. Its totient is φ = 88528.

The previous prime is 221327. The next prime is 221393. The reversal of 221330 is 33122.

221330 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 219961 + 1369 = 469^2 + 37^2 .

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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11057 + ... + 11076.

2²²¹³³⁰ is an apocalyptic number.

221330 is a deficient number, since it is larger than the sum of its proper divisors (177082).

221330 is a wasteful number, since it uses less digits than its factorization.

221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22140.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 221330 is about 470.4572244105. The cubic root of 221330 is about 60.4895139261.

Adding to 221330 its reverse (33122), we get a palindrome (254452).

The spelling of 221330 in words is "two hundred twenty-one thousand, three hundred thirty".