33288221 has 2 divisors, whose sum is σ = 33288222. Its totient is φ = 33288220.

The previous prime is 33288191. The next prime is 33288251. The reversal of 33288221 is 12288233.

It is a balanced prime because it is at equal distance from previous prime (33288191) and next prime (33288251).

It can be written as a sum of positive squares in only one way, i.e., 18156121 + 15132100 = 4261^2 + 3890^2 .

It is a cyclic number.

It is not a de Polignac number, because 33288221 - 2¹⁴ = 33271837 is a prime.

It is a super-2 number, since 2×33288221² = 2216211314689682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33288251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16644110 + 16644111.

It is an arithmetic number, because the mean of its divisors is an integer number (16644111).

Almost surely, 2^33288221 is an apocalyptic number.

It is an amenable number.

33288221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33288221 is an equidigital number, since it uses as much as digits as its factorization.

33288221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

The square root of 33288221 is about 5769.5945264810. The cubic root of 33288221 is about 321.6845443931.

The spelling of 33288221 in words is "thirty-three million, two hundred eighty-eight thousand, two hundred twenty-one".