33001220 has 24 divisors (see below), whose sum is σ = 79203264. Its totient is φ = 11314656.

The previous prime is 33001219. The next prime is 33001247. The reversal of 33001220 is 2210033.

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, 117722 + ... + 118001.

It is an arithmetic number, because the mean of its divisors is an integer number (3300136).

Almost surely, 2^33001220 is an apocalyptic number.

It is an amenable number.

33001220 is an abundant number, since it is smaller than the sum of its proper divisors (46202044).

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

33001220 is a wasteful number, since it uses less digits than its factorization.

33001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235739 (or 235737 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 33001220 is about 5744.6688329268. The cubic root of 33001220 is about 320.7573856699.

Adding to 33001220 its reverse (2210033), we get a palindrome (35211253).

The spelling of 33001220 in words is "thirty-three million, one thousand, two hundred twenty".