221333233 has 8 divisors (see below), whose sum is σ = 243055296. Its totient is φ = 199878000.

The previous prime is 221333219. The next prime is 221333237. The reversal of 221333233 is 332333122.

221333233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 221333233 - 2⁵ = 221333201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221333237) 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, 64966 + ... + 68287.

It is an arithmetic number, because the mean of its divisors is an integer number (30381912).

Almost surely, 2^221333233 is an apocalyptic number.

It is an amenable number.

221333233 is a deficient number, since it is larger than the sum of its proper divisors (21722063).

221333233 is a wasteful number, since it uses less digits than its factorization.

221333233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133415.

The product of its digits is 1944, while the sum is 22.

The square root of 221333233 is about 14877.2723642474. The cubic root of 221333233 is about 604.8980845107.

Adding to 221333233 its reverse (332333122), we get a palindrome (553666355).

The spelling of 221333233 in words is "two hundred twenty-one million, three hundred thirty-three thousand, two hundred thirty-three".