33033221 has 8 divisors (see below), whose sum is σ = 37121280. Its totient is φ = 29166192.

The previous prime is 33033173. The next prime is 33033239. The reversal of 33033221 is 12233033.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33033221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33033221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33033241) 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, 54941 + ... + 55538.

It is an arithmetic number, because the mean of its divisors is an integer number (4640160).

Almost surely, 2^33033221 is an apocalyptic number.

It is an amenable number.

33033221 is a deficient number, since it is larger than the sum of its proper divisors (4088059).

33033221 is a wasteful number, since it uses less digits than its factorization.

33033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110515.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 33033221 is about 5747.4534360880. The cubic root of 33033221 is about 320.8610307379.

Adding to 33033221 its reverse (12233033), we get a palindrome (45266254).

The spelling of 33033221 in words is "thirty-three million, thirty-three thousand, two hundred twenty-one".