33221805 has 16 divisors (see below), whose sum is σ = 53343360. Its totient is φ = 17655488.

The previous prime is 33221777. The next prime is 33221807. The reversal of 33221805 is 50812233.

It is a cyclic number.

It is not a de Polignac number, because 33221805 - 2¹⁴ = 33205421 is a prime.

It is a super-2 number, since 2×33221805² = 2207376654916050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221807) 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 15 ways as a sum of consecutive naturals, for example, 616 + ... + 8174.

It is an arithmetic number, because the mean of its divisors is an integer number (3333960).

Almost surely, 2^33221805 is an apocalyptic number.

It is an amenable number.

33221805 is a deficient number, since it is larger than the sum of its proper divisors (20121555).

33221805 is a wasteful number, since it uses less digits than its factorization.

33221805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7860.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 33221805 is about 5763.8359622737. The cubic root of 33221805 is about 321.4704624062.

The spelling of 33221805 in words is "thirty-three million, two hundred twenty-one thousand, eight hundred five".