33369221 has 2 divisors, whose sum is σ = 33369222. Its totient is φ = 33369220.

The previous prime is 33369199. The next prime is 33369223. The reversal of 33369221 is 12296333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24453025 + 8916196 = 4945^2 + 2986^2 .

It is a cyclic number.

It is not a de Polignac number, because 33369221 - 2⁶ = 33369157 is a prime.

It is a super-2 number, since 2×33369221² = 2227009820293682, which contains 22 as substring.

Together with 33369223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33369223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16684610 + 16684611.

It is an arithmetic number, because the mean of its divisors is an integer number (16684611).

Almost surely, 2^33369221 is an apocalyptic number.

It is an amenable number.

33369221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33369221 is an equidigital number, since it uses as much as digits as its factorization.

33369221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 29.

The square root of 33369221 is about 5776.6098189163. The cubic root of 33369221 is about 321.9452506481.

The spelling of 33369221 in words is "thirty-three million, three hundred sixty-nine thousand, two hundred twenty-one".