33221130 has 48 divisors (see below), whose sum is σ = 81678240. Its totient is φ = 8645248.

The previous prime is 33221093. The next prime is 33221137. The reversal of 33221130 is 3112233.

It is a super-2 number, since 2×33221130² = 2207286956953800, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221137) 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, 242422 + ... + 242558.

It is an arithmetic number, because the mean of its divisors is an integer number (1701630).

Almost surely, 2^33221130 is an apocalyptic number.

33221130 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 33221130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40839120).

33221130 is an abundant number, since it is smaller than the sum of its proper divisors (48457110).

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

33221130 is a wasteful number, since it uses less digits than its factorization.

33221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 206 counting only the distinct ones).

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

The square root of 33221130 is about 5763.7774072218. Note that the first 3 decimals coincide. The cubic root of 33221130 is about 321.4682851812.

Adding to 33221130 its reverse (3112233), we get a palindrome (36333363).

The spelling of 33221130 in words is "thirty-three million, two hundred twenty-one thousand, one hundred thirty".