33221868 has 12 divisors (see below), whose sum is σ = 77517720. Its totient is φ = 11073952.

The previous prime is 33221857. The next prime is 33221869. The reversal of 33221868 is 86812233.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×33221868² = 2207385026818848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33221869) 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 3 ways as a sum of consecutive naturals, for example, 1384233 + ... + 1384256.

It is an arithmetic number, because the mean of its divisors is an integer number (6459810).

Almost surely, 2^33221868 is an apocalyptic number.

It is an amenable number.

33221868 is an abundant number, since it is smaller than the sum of its proper divisors (44295852).

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

33221868 is a wasteful number, since it uses less digits than its factorization.

33221868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768496 (or 2768494 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 33221868 is about 5763.8414273816. The cubic root of 33221868 is about 321.4706656123.

The spelling of 33221868 in words is "thirty-three million, two hundred twenty-one thousand, eight hundred sixty-eight".