33220000 has 120 divisors (see below), whose sum is σ = 89746272. Its totient is φ = 12000000.

The previous prime is 33219983. The next prime is 33220001. The reversal of 33220000 is 2233.

It is a super-2 number, since 2×33220000² = 2207136800000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (33220001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 219925 + ... + 220075.

Almost surely, 2^33220000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44873136).

33220000 is an abundant number, since it is smaller than the sum of its proper divisors (56526272).

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

33220000 is a wasteful number, since it uses less digits than its factorization.

33220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 10.

The square root of 33220000 is about 5763.6793803958. The cubic root of 33220000 is about 321.4646402793.

Adding to 33220000 its reverse (2233), we get a palindrome (33222233).

The spelling of 33220000 in words is "thirty-three million, two hundred twenty thousand".