33040221 has 8 divisors (see below), whose sum is σ = 46372320. Its totient is φ = 20867472.

The previous prime is 33040127. The next prime is 33040229. The reversal of 33040221 is 12204033.

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

It is not a de Polignac number, because 33040221 - 2¹³ = 33032029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33040221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33040229) 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, 289770 + ... + 289883.

It is an arithmetic number, because the mean of its divisors is an integer number (5796540).

Almost surely, 2^33040221 is an apocalyptic number.

It is an amenable number.

33040221 is a deficient number, since it is larger than the sum of its proper divisors (13332099).

33040221 is a wasteful number, since it uses less digits than its factorization.

33040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579675.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 33040221 is about 5748.0623691815. The cubic root of 33040221 is about 320.8836934646.

Adding to 33040221 its reverse (12204033), we get a palindrome (45244254).

The spelling of 33040221 in words is "thirty-three million, forty thousand, two hundred twenty-one".