33212420 has 24 divisors (see below), whose sum is σ = 69854400. Its totient is φ = 13264352.

The previous prime is 33212401. The next prime is 33212449. The reversal of 33212420 is 2421233.

It is a super-2 number, since 2×33212420² = 2206129684512800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24521 + ... + 25839.

It is an arithmetic number, because the mean of its divisors is an integer number (2910600).

Almost surely, 2^33212420 is an apocalyptic number.

It is an amenable number.

33212420 is an abundant number, since it is smaller than the sum of its proper divisors (36641980).

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

33212420 is a wasteful number, since it uses less digits than its factorization.

33212420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587 (or 2585 counting only the distinct ones).

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

The square root of 33212420 is about 5763.0217768112. The cubic root of 33212420 is about 321.4401882692.

Adding to 33212420 its reverse (2421233), we get a palindrome (35633653).

The spelling of 33212420 in words is "thirty-three million, two hundred twelve thousand, four hundred twenty".