33130212 has 72 divisors (see below), whose sum is σ = 85843296. Its totient is φ = 9909504.

The previous prime is 33130199. The next prime is 33130213. The reversal of 33130212 is 21203133.

It is a super-2 number, since 2×33130212² = 2195221894329888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33130191 and 33130200.

It is not an unprimeable number, because it can be changed into a prime (33130213) 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, 107763 + ... + 108069.

It is an arithmetic number, because the mean of its divisors is an integer number (1192268).

Almost surely, 2^33130212 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 33130212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42921648).

33130212 is an abundant number, since it is smaller than the sum of its proper divisors (52713084).

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

33130212 is a wasteful number, since it uses less digits than its factorization.

33130212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 33130212 is about 5755.8849884271. The cubic root of 33130212 is about 321.1747575704.

Adding to 33130212 its reverse (21203133), we get a palindrome (54333345).

The spelling of 33130212 in words is "thirty-three million, one hundred thirty thousand, two hundred twelve".