2133221232 has 80 divisors (see below), whose sum is σ = 5577500160. Its totient is φ = 702514176.

The previous prime is 2133221213. The next prime is 2133221249. The reversal of 2133221232 is 2321223312.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 2133221199 and 2133221208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2966569 + ... + 2967287.

It is an arithmetic number, because the mean of its divisors is an integer number (69718752).

Almost surely, 2^2133221232 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 2133221232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2788750080).

2133221232 is an abundant number, since it is smaller than the sum of its proper divisors (3444278928).

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

2133221232 is a wasteful number, since it uses less digits than its factorization.

2133221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390 (or 1384 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 2133221232 is about 46186.8079866968. The cubic root of 2133221232 is about 1287.2966306110.

Adding to 2133221232 its reverse (2321223312), we get a palindrome (4454444544).

The spelling of 2133221232 in words is "two billion, one hundred thirty-three million, two hundred twenty-one thousand, two hundred thirty-two".