33220120 has 16 divisors (see below), whose sum is σ = 74745360. Its totient is φ = 13288032.

The previous prime is 33220097. The next prime is 33220129. The reversal of 33220120 is 2102233.

It is a happy number.

It is a super-2 number, since 2×33220120² = 2207152745628800, 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 33220120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33220129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415212 + ... + 415291.

It is an arithmetic number, because the mean of its divisors is an integer number (4671585).

Almost surely, 2^33220120 is an apocalyptic number.

It is an amenable number.

33220120 is an abundant number, since it is smaller than the sum of its proper divisors (41525240).

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

33220120 is a wasteful number, since it uses less digits than its factorization.

33220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830514 (or 830510 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 33220120 is about 5763.6897904034. The cubic root of 33220120 is about 321.4650273524.

Adding to 33220120 its reverse (2102233), we get a palindrome (35322353).

The spelling of 33220120 in words is "thirty-three million, two hundred twenty thousand, one hundred twenty".