33797221 has 2 divisors, whose sum is σ = 33797222. Its totient is φ = 33797220.

The previous prime is 33797201. The next prime is 33797251. The reversal of 33797221 is 12279733.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31192225 + 2604996 = 5585^2 + 1614^2 .

It is a cyclic number.

It is not a de Polignac number, because 33797221 - 2²⁵ = 242789 is a prime.

It is a super-2 number, since 2×33797221² = 2284504294645682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33797201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16898610 + 16898611.

It is an arithmetic number, because the mean of its divisors is an integer number (16898611).

Almost surely, 2^33797221 is an apocalyptic number.

It is an amenable number.

33797221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33797221 is an equidigital number, since it uses as much as digits as its factorization.

33797221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 34.

The square root of 33797221 is about 5813.5377353209. The cubic root of 33797221 is about 323.3158511349.

The spelling of 33797221 in words is "thirty-three million, seven hundred ninety-seven thousand, two hundred twenty-one".