33255221 has 8 divisors (see below), whose sum is σ = 33990840. Its totient is φ = 32523712.

The previous prime is 33255203. The next prime is 33255227. The reversal of 33255221 is 12255233.

It can be written as a sum of positive squares in 4 ways, for example, as 5808100 + 27447121 = 2410^2 + 5239^2 .

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 33255221 - 2¹⁰ = 33254197 is a prime.

It is a super-2 number, since 2×33255221² = 2211819447517682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33255227) 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, 19811 + ... + 21423.

It is an arithmetic number, because the mean of its divisors is an integer number (4248855).

Almost surely, 2^33255221 is an apocalyptic number.

It is an amenable number.

33255221 is a deficient number, since it is larger than the sum of its proper divisors (735619).

33255221 is a wasteful number, since it uses less digits than its factorization.

33255221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055.

The product of its digits is 1800, while the sum is 23.

The square root of 33255221 is about 5766.7339976801. The cubic root of 33255221 is about 321.5782094847.

The spelling of 33255221 in words is "thirty-three million, two hundred fifty-five thousand, two hundred twenty-one".