33390217 has 12 divisors (see below), whose sum is σ = 39004416. Its totient is φ = 28500360.

The previous prime is 33390191. The next prime is 33390233. The reversal of 33390217 is 71209333.

It is not a de Polignac number, because 33390217 - 2¹¹ = 33388169 is a prime.

It is a super-2 number, since 2×33390217² = 2229813182614178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33390517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11592 + ... + 14182.

It is an arithmetic number, because the mean of its divisors is an integer number (3250368).

Almost surely, 2^33390217 is an apocalyptic number.

It is an amenable number.

33390217 is a deficient number, since it is larger than the sum of its proper divisors (5614199).

33390217 is a wasteful number, since it uses less digits than its factorization.

33390217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868 (or 2861 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 33390217 is about 5778.4268620447. The cubic root of 33390217 is about 322.0127594188.

The spelling of 33390217 in words is "thirty-three million, three hundred ninety thousand, two hundred seventeen".