33935221 has 2 divisors, whose sum is σ = 33935222. Its totient is φ = 33935220.

The previous prime is 33935219. The next prime is 33935243. The reversal of 33935221 is 12253933.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27615025 + 6320196 = 5255^2 + 2514^2 .

It is a cyclic number.

It is not a de Polignac number, because 33935221 - 2¹ = 33935219 is a prime.

Together with 33935219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 33935221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33935261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16967610 + 16967611.

It is an arithmetic number, because the mean of its divisors is an integer number (16967611).

Almost surely, 2^33935221 is an apocalyptic number.

It is an amenable number.

33935221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33935221 is an equidigital number, since it uses as much as digits as its factorization.

33935221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 28.

The square root of 33935221 is about 5825.3944930794. The cubic root of 33935221 is about 323.7553053895.

The spelling of 33935221 in words is "thirty-three million, nine hundred thirty-five thousand, two hundred twenty-one".