33108921 has 12 divisors (see below), whose sum is σ = 48538672. Its totient is φ = 21742776.

The previous prime is 33108893. The next prime is 33108947. The reversal of 33108921 is 12980133.

It is not a de Polignac number, because 33108921 - 2⁶ = 33108857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33108521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26851 + ... + 28056.

Almost surely, 2^33108921 is an apocalyptic number.

It is an amenable number.

33108921 is a deficient number, since it is larger than the sum of its proper divisors (15429751).

33108921 is a wasteful number, since it uses less digits than its factorization.

33108921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54980 (or 54977 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 33108921 is about 5754.0351928017. The cubic root of 33108921 is about 321.1059422635.

The spelling of 33108921 in words is "thirty-three million, one hundred eight thousand, nine hundred twenty-one".