33216012 has 18 divisors (see below), whose sum is σ = 83962788. Its totient is φ = 11071992.

The previous prime is 33215999. The next prime is 33216013. The reversal of 33216012 is 21061233.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×33216012² = 2206606906368288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (33216013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 461298 + ... + 461369.

Almost surely, 2^33216012 is an apocalyptic number.

It is an amenable number.

33216012 is an abundant number, since it is smaller than the sum of its proper divisors (50746776).

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

33216012 is a wasteful number, since it uses less digits than its factorization.

33216012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922677 (or 922672 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 33216012 is about 5763.3334104492. Note that the first 3 decimals coincide. The cubic root of 33216012 is about 321.4517760179.

Adding to 33216012 its reverse (21061233), we get a palindrome (54277245).

The spelling of 33216012 in words is "thirty-three million, two hundred sixteen thousand, twelve".