33009621 has 8 divisors (see below), whose sum is σ = 44129280. Its totient is φ = 21948192.

The previous prime is 33009589. The next prime is 33009629. The reversal of 33009621 is 12690033.

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

It is not a de Polignac number, because 33009621 - 2⁵ = 33009589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33009591 and 33009600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33009629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13216 + ... + 15513.

It is an arithmetic number, because the mean of its divisors is an integer number (5516160).

Almost surely, 2^33009621 is an apocalyptic number.

It is an amenable number.

33009621 is a deficient number, since it is larger than the sum of its proper divisors (11119659).

33009621 is a wasteful number, since it uses less digits than its factorization.

33009621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29115.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 33009621 is about 5745.3999860758. The cubic root of 33009621 is about 320.7846013726.

Adding to 33009621 its reverse (12690033), we get a palindrome (45699654).

It can be divided in two parts, 3300 and 9621, that added together give a palindrome (12921).

The spelling of 33009621 in words is "thirty-three million, nine thousand, six hundred twenty-one".