33133321 has 16 divisors (see below), whose sum is σ = 38283840. Its totient is φ = 28416960.

The previous prime is 33133297. The next prime is 33133337. The reversal of 33133321 is 12333133.

It is not a de Polignac number, because 33133321 - 2⁷ = 33133193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33133361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11826 + ... + 14356.

It is an arithmetic number, because the mean of its divisors is an integer number (2392740).

Almost surely, 2^33133321 is an apocalyptic number.

It is an amenable number.

33133321 is a deficient number, since it is larger than the sum of its proper divisors (5150519).

33133321 is a wasteful number, since it uses less digits than its factorization.

33133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616.

The product of its digits is 486, while the sum is 19.

The square root of 33133321 is about 5756.1550535058. The cubic root of 33133321 is about 321.1848037994.

Adding to 33133321 its reverse (12333133), we get a palindrome (45466454).

The spelling of 33133321 in words is "thirty-three million, one hundred thirty-three thousand, three hundred twenty-one".