33310221 has 8 divisors (see below), whose sum is σ = 50758464. Its totient is φ = 19034400.

The previous prime is 33310217. The next prime is 33310223. The reversal of 33310221 is 12201333.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33310221 - 2² = 33310217 is a prime.

It is a super-2 number, since 2×33310221² = 2219141646137682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33310221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33310223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793080 + ... + 793121.

It is an arithmetic number, because the mean of its divisors is an integer number (6344808).

Almost surely, 2^33310221 is an apocalyptic number.

It is an amenable number.

33310221 is a deficient number, since it is larger than the sum of its proper divisors (17448243).

33310221 is a wasteful number, since it uses less digits than its factorization.

33310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586211.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 33310221 is about 5771.5007580351. The cubic root of 33310221 is about 321.7553952955.

Adding to 33310221 its reverse (12201333), we get a palindrome (45511554).

The spelling of 33310221 in words is "thirty-three million, three hundred ten thousand, two hundred twenty-one".