33221166 has 16 divisors (see below), whose sum is σ = 72482688. Its totient is φ = 10067000.

The previous prime is 33221161. The next prime is 33221171. The reversal of 33221166 is 66112233.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (33221161) and next prime (33221171).

It is a super-2 number, since 2×33221166² = 2207291740799112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251610 + ... + 251741.

It is an arithmetic number, because the mean of its divisors is an integer number (4530168).

Almost surely, 2^33221166 is an apocalyptic number.

33221166 is an abundant number, since it is smaller than the sum of its proper divisors (39261522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33221166 is a wasteful number, since it uses less digits than its factorization.

33221166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503367.

The product of its digits is 1296, while the sum is 24.

The square root of 33221166 is about 5763.7805301729. The cubic root of 33221166 is about 321.4684013006.

Adding to 33221166 its reverse (66112233), we get a palindrome (99333399).

The spelling of 33221166 in words is "thirty-three million, two hundred twenty-one thousand, one hundred sixty-six".