33135021 has 16 divisors (see below), whose sum is σ = 49177600. Its totient is φ = 22050144.

The previous prime is 33134999. The next prime is 33135041. The reversal of 33135021 is 12053133.

It is not a de Polignac number, because 33135021 - 2¹⁴ = 33118637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33134985 and 33135003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33135041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28785 + ... + 29913.

It is an arithmetic number, because the mean of its divisors is an integer number (3073600).

Almost surely, 2^33135021 is an apocalyptic number.

It is an amenable number.

33135021 is a deficient number, since it is larger than the sum of its proper divisors (16042579).

33135021 is a wasteful number, since it uses less digits than its factorization.

33135021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225 (or 2219 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 33135021 is about 5756.3027196283. The cubic root of 33135021 is about 321.1902968078.

Adding to 33135021 its reverse (12053133), we get a palindrome (45188154).

The spelling of 33135021 in words is "thirty-three million, one hundred thirty-five thousand, twenty-one".