33009825 has 12 divisors (see below), whose sum is σ = 54576368. Its totient is φ = 17605200.

The previous prime is 33009811. The next prime is 33009829. The reversal of 33009825 is 52890033.

It is a happy number.

It is not a de Polignac number, because 33009825 - 2⁵ = 33009793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33009792 and 33009801.

It is not an unprimeable number, because it can be changed into a prime (33009829) 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, 219991 + ... + 220140.

Almost surely, 2^33009825 is an apocalyptic number.

It is an amenable number.

33009825 is a deficient number, since it is larger than the sum of its proper divisors (21566543).

33009825 is a wasteful number, since it uses less digits than its factorization.

33009825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440144 (or 440139 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 33009825 is about 5745.4177393815. The cubic root of 33009825 is about 320.7852621893.

Adding to 33009825 its reverse (52890033), we get a palindrome (85899858).

The spelling of 33009825 in words is "thirty-three million, nine thousand, eight hundred twenty-five".