33221081 has 2 divisors, whose sum is σ = 33221082. Its totient is φ = 33221080.

The previous prime is 33221051. The next prime is 33221093. The reversal of 33221081 is 18012233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32718400 + 502681 = 5720^2 + 709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33221081 is a prime.

It is a super-2 number, since 2×33221081² = 2207280445617122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (33221011) 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 as a sum of consecutive naturals, namely, 16610540 + 16610541.

It is an arithmetic number, because the mean of its divisors is an integer number (16610541).

Almost surely, 2^33221081 is an apocalyptic number.

It is an amenable number.

33221081 is a deficient number, since it is larger than the sum of its proper divisors (1).

33221081 is an equidigital number, since it uses as much as digits as its factorization.

33221081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 33221081 is about 5763.7731565356. The cubic root of 33221081 is about 321.4681271296.

The spelling of 33221081 in words is "thirty-three million, two hundred twenty-one thousand, eighty-one".