221330333 has 8 divisors (see below), whose sum is σ = 253114368. Its totient is φ = 189587664.

The previous prime is 221330309. The next prime is 221330339. The reversal of 221330333 is 333033122.

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

It is not a de Polignac number, because 221330333 - 2⁶ = 221330269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221330339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2135 + ... + 21147.

It is an arithmetic number, because the mean of its divisors is an integer number (31639296).

Almost surely, 2^221330333 is an apocalyptic number.

It is an amenable number.

221330333 is a deficient number, since it is larger than the sum of its proper divisors (31784035).

221330333 is a wasteful number, since it uses less digits than its factorization.

221330333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20683.

The product of its (nonzero) digits is 972, while the sum is 20.

The square root of 221330333 is about 14877.1748998256. The cubic root of 221330333 is about 604.8954426238.

Adding to 221330333 its reverse (333033122), we get a palindrome (554363455).

The spelling of 221330333 in words is "two hundred twenty-one million, three hundred thirty thousand, three hundred thirty-three".