33005285 has 8 divisors (see below), whose sum is σ = 39999096. Its totient is φ = 26142400.

The previous prime is 33005281. The next prime is 33005303. The reversal of 33005285 is 58250033.

It can be written as a sum of positive squares in 4 ways, for example, as 20052484 + 12952801 = 4478^2 + 3599^2 .

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

It is not a de Polignac number, because 33005285 - 2² = 33005281 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33005281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32174 + ... + 33183.

It is an arithmetic number, because the mean of its divisors is an integer number (4999887).

Almost surely, 2^33005285 is an apocalyptic number.

It is an amenable number.

33005285 is a deficient number, since it is larger than the sum of its proper divisors (6993811).

33005285 is a wasteful number, since it uses less digits than its factorization.

33005285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65463.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 33005285 is about 5745.0226283279. The cubic root of 33005285 is about 320.7705551350.

The spelling of 33005285 in words is "thirty-three million, five thousand, two hundred eighty-five".