33628229 has 2 divisors, whose sum is σ = 33628230. Its totient is φ = 33628228.

The previous prime is 33628223. The next prime is 33628237. The reversal of 33628229 is 92282633.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19377604 + 14250625 = 4402^2 + 3775^2 .

It is an emirp because it is prime and its reverse (92282633) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33628229 - 2⁴ = 33628213 is a prime.

It is a super-2 number, since 2×33628229² = 2261715571352882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33628223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16814114 + 16814115.

It is an arithmetic number, because the mean of its divisors is an integer number (16814115).

Almost surely, 2^33628229 is an apocalyptic number.

It is an amenable number.

33628229 is a deficient number, since it is larger than the sum of its proper divisors (1).

33628229 is an equidigital number, since it uses as much as digits as its factorization.

33628229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 33628229 is about 5798.9851698379. The cubic root of 33628229 is about 322.7760719196.

The spelling of 33628229 in words is "thirty-three million, six hundred twenty-eight thousand, two hundred twenty-nine".