33216612 has 72 divisors (see below), whose sum is σ = 91617120. Its totient is φ = 9285120.

The previous prime is 33216607. The next prime is 33216613. The reversal of 33216612 is 21661233.

It is a happy number.

It is a super-2 number, since 2×33216612² = 2206686625517088, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (33216613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21564 + ... + 23052.

It is an arithmetic number, because the mean of its divisors is an integer number (1272460).

Almost surely, 2^33216612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33216612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45808560).

33216612 is an abundant number, since it is smaller than the sum of its proper divisors (58400508).

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

33216612 is a wasteful number, since it uses less digits than its factorization.

33216612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1518 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 33216612 is about 5763.3854634234. The cubic root of 33216612 is about 321.4537115292.

Adding to 33216612 its reverse (21661233), we get a palindrome (54877845).

The spelling of 33216612 in words is "thirty-three million, two hundred sixteen thousand, six hundred twelve".