33112220 has 24 divisors (see below), whose sum is σ = 70190064. Its totient is φ = 13120256.

The previous prime is 33112217. The next prime is 33112267. The reversal of 33112220 is 2221133.

It is a happy number.

It is a super-2 number, since 2×33112220² = 2192838226656800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33112195 and 33112204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5597 + ... + 9876.

It is an arithmetic number, because the mean of its divisors is an integer number (2924586).

Almost surely, 2^33112220 is an apocalyptic number.

It is an amenable number.

33112220 is an abundant number, since it is smaller than the sum of its proper divisors (37077844).

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

33112220 is a wasteful number, since it uses less digits than its factorization.

33112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15589 (or 15587 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 33112220 is about 5754.3218540502. The cubic root of 33112220 is about 321.1166069957.

Adding to 33112220 its reverse (2221133), we get a palindrome (35333353).

The spelling of 33112220 in words is "thirty-three million, one hundred twelve thousand, two hundred twenty".