33421220 has 24 divisors (see below), whose sum is σ = 80211264. Its totient is φ = 11458656.

The previous prime is 33421189. The next prime is 33421237. The reversal of 33421220 is 2212433.

It is a super-2 number, since 2×33421220² = 2233955892576800, which contains 22 as substring.

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, 119222 + ... + 119501.

It is an arithmetic number, because the mean of its divisors is an integer number (3342136).

Almost surely, 2^33421220 is an apocalyptic number.

It is an amenable number.

33421220 is an abundant number, since it is smaller than the sum of its proper divisors (46790044).

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

33421220 is a wasteful number, since it uses less digits than its factorization.

33421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238739 (or 238737 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 33421220 is about 5781.1088901698. The cubic root of 33421220 is about 322.1123921276.

Adding to 33421220 its reverse (2212433), we get a palindrome (35633653).

The spelling of 33421220 in words is "thirty-three million, four hundred twenty-one thousand, two hundred twenty".