33221900 has 18 divisors (see below), whose sum is σ = 72091740. Its totient is φ = 13288720.

The previous prime is 33221891. The next prime is 33221957. The reversal of 33221900 is 912233.

It is a super-2 number, since 2×33221900² = 2207389279220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166010 + ... + 166209.

Almost surely, 2^33221900 is an apocalyptic number.

It is an amenable number.

33221900 is an abundant number, since it is smaller than the sum of its proper divisors (38869840).

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

33221900 is a wasteful number, since it uses less digits than its factorization.

33221900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332233 (or 332226 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 33221900 is about 5763.8442033074. The cubic root of 33221900 is about 321.4707688281.

The spelling of 33221900 in words is "thirty-three million, two hundred twenty-one thousand, nine hundred".