33205212 has 18 divisors (see below), whose sum is σ = 83935488. Its totient is φ = 11068392.

The previous prime is 33205187. The next prime is 33205213. The reversal of 33205212 is 21250233.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×33205212² = 2205172207929888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33205213) 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 5 ways as a sum of consecutive naturals, for example, 461148 + ... + 461219.

Almost surely, 2^33205212 is an apocalyptic number.

It is an amenable number.

33205212 is an abundant number, since it is smaller than the sum of its proper divisors (50730276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33205212 is a wasteful number, since it uses less digits than its factorization.

33205212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922377 (or 922372 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 33205212 is about 5762.3963765086. The cubic root of 33205212 is about 321.4169328273.

Adding to 33205212 its reverse (21250233), we get a palindrome (54455445).

The spelling of 33205212 in words is "thirty-three million, two hundred five thousand, two hundred twelve".