33105220 has 24 divisors (see below), whose sum is σ = 73180800. Its totient is φ = 12544992.

The previous prime is 33105209. The next prime is 33105221. The reversal of 33105220 is 2250133.

It is a junction number, because it is equal to n+sod(n) for n = 33105194 and 33105203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33105221) 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, 43180 + ... + 43939.

It is an arithmetic number, because the mean of its divisors is an integer number (3049200).

Almost surely, 2^33105220 is an apocalyptic number.

It is an amenable number.

33105220 is an abundant number, since it is smaller than the sum of its proper divisors (40075580).

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

33105220 is a wasteful number, since it uses less digits than its factorization.

33105220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87147 (or 87145 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 33105220 is about 5753.7135834172. The cubic root of 33105220 is about 321.0939771361.

Adding to 33105220 its reverse (2250133), we get a palindrome (35355353).

The spelling of 33105220 in words is "thirty-three million, one hundred five thousand, two hundred twenty".