33000221 has 8 divisors (see below), whose sum is σ = 34151040. Its totient is φ = 31866912.

The previous prime is 33000199. The next prime is 33000223. The reversal of 33000221 is 12200033.

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 33000221 - 2¹⁴ = 32983837 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 (33000223) 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, 485 + ... + 8138.

It is an arithmetic number, because the mean of its divisors is an integer number (4268880).

Almost surely, 2^33000221 is an apocalyptic number.

It is an amenable number.

33000221 is a deficient number, since it is larger than the sum of its proper divisors (1150819).

33000221 is an equidigital number, since it uses as much as digits as its factorization.

33000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8755.

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

The square root of 33000221 is about 5744.5818820868. The cubic root of 33000221 is about 320.7541490233.

Adding to 33000221 its reverse (12200033), we get a palindrome (45200254).

The spelling of 33000221 in words is "thirty-three million, two hundred twenty-one", and thus it is an aban number.