33055221 has 8 divisors (see below), whose sum is σ = 44298144. Its totient is φ = 21924560.

The previous prime is 33055213. The next prime is 33055277. The reversal of 33055221 is 12255033.

33055221 = T₄₇₈ + T₄₇₉ + ... + T₆₇₄.

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

It is a cyclic number.

It is not a de Polignac number, because 33055221 - 2³ = 33055213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33055291) 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, 27375 + ... + 28556.

It is an arithmetic number, because the mean of its divisors is an integer number (5537268).

Almost surely, 2^33055221 is an apocalyptic number.

It is an amenable number.

33055221 is a deficient number, since it is larger than the sum of its proper divisors (11242923).

33055221 is a wasteful number, since it uses less digits than its factorization.

33055221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56131.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 33055221 is about 5749.3670086367. The cubic root of 33055221 is about 320.9322456741.

The spelling of 33055221 in words is "thirty-three million, fifty-five thousand, two hundred twenty-one".