33335221 has 4 divisors (see below), whose sum is σ = 33415200. Its totient is φ = 33255244.

The previous prime is 33335209. The next prime is 33335227. The reversal of 33335221 is 12253333.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33335221 - 2⁵ = 33335189 is a prime.

It is a super-2 number, since 2×33335221² = 2222473918237682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33335192 and 33335201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33335227) 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 3 ways as a sum of consecutive naturals, for example, 39361 + ... + 40198.

It is an arithmetic number, because the mean of its divisors is an integer number (8353800).

Almost surely, 2^33335221 is an apocalyptic number.

It is an amenable number.

33335221 is a deficient number, since it is larger than the sum of its proper divisors (79979).

33335221 is an equidigital number, since it uses as much as digits as its factorization.

33335221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79978.

The product of its digits is 1620, while the sum is 22.

The square root of 33335221 is about 5773.6661663106. Note that the first 3 decimals coincide. The cubic root of 33335221 is about 321.8358698276.

Adding to 33335221 its reverse (12253333), we get a palindrome (45588554).

The spelling of 33335221 in words is "thirty-three million, three hundred thirty-five thousand, two hundred twenty-one".