33212130 has 64 divisors (see below), whose sum is σ = 92171520. Its totient is φ = 7501824.

The previous prime is 33212119. The next prime is 33212131. The reversal of 33212130 is 3121233.

It is a super-2 number, since 2×33212130² = 2206091158273800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (33212131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17802 + ... + 19578.

It is an arithmetic number, because the mean of its divisors is an integer number (1440180).

Almost surely, 2^33212130 is an apocalyptic number.

33212130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 33212130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46085760).

33212130 is an abundant number, since it is smaller than the sum of its proper divisors (58959390).

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

33212130 is a wasteful number, since it uses less digits than its factorization.

33212130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883.

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

The square root of 33212130 is about 5762.9966163447. The cubic root of 33212130 is about 321.4392526962.

Adding to 33212130 its reverse (3121233), we get a palindrome (36333363).

The spelling of 33212130 in words is "thirty-three million, two hundred twelve thousand, one hundred thirty".