2221321232 has 80 divisors (see below), whose sum is σ = 4855189248. Its totient is φ = 976842240.

The previous prime is 2221321231. The next prime is 2221321241. The reversal of 2221321232 is 2321231222.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2221321231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1487078 + ... + 1488570.

Almost surely, 2^2221321232 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 2221321232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2427594624).

2221321232 is an abundant number, since it is smaller than the sum of its proper divisors (2633868016).

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

2221321232 is a wasteful number, since it uses less digits than its factorization.

2221321232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848 (or 1842 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 2221321232 is about 47130.8946658134. The cubic root of 2221321232 is about 1304.7794936758.

Adding to 2221321232 its reverse (2321231222), we get a palindrome (4542552454).

The spelling of 2221321232 in words is "two billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred thirty-two".