33165985 has 4 divisors (see below), whose sum is σ = 39799188. Its totient is φ = 26532784.

The previous prime is 33165983. The next prime is 33165989. The reversal of 33165985 is 58956133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58956133 = 37 ⋅1593409.

It can be written as a sum of positive squares in 2 ways, for example, as 24117921 + 9048064 = 4911^2 + 3008^2 .

It is a cyclic number.

It is not a de Polignac number, because 33165985 - 2¹ = 33165983 is a prime.

It is a super-2 number, since 2×33165985² = 2199965122040450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33165983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3316594 + ... + 3316603.

It is an arithmetic number, because the mean of its divisors is an integer number (9949797).

Almost surely, 2^33165985 is an apocalyptic number.

It is an amenable number.

33165985 is a deficient number, since it is larger than the sum of its proper divisors (6633203).

33165985 is an equidigital number, since it uses as much as digits as its factorization.

33165985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6633202.

The product of its digits is 97200, while the sum is 40.

The square root of 33165985 is about 5758.9916652136. The cubic root of 33165985 is about 321.2903142491.

The spelling of 33165985 in words is "thirty-three million, one hundred sixty-five thousand, nine hundred eighty-five".