2221323132 has 96 divisors (see below), whose sum is σ = 6064694272. Its totient is φ = 619716096.

The previous prime is 2221323119. The next prime is 2221323149. The reversal of 2221323132 is 2313231222.

It is a happy number.

2221323132 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 = 2221323099 and 2221323108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 629838 + ... + 633354.

Almost surely, 2^2221323132 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 2221323132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3032347136).

2221323132 is an abundant number, since it is smaller than the sum of its proper divisors (3843371140).

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

2221323132 is a wasteful number, since it uses less digits than its factorization.

2221323132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707 (or 3705 counting only the distinct ones).

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

The square root of 2221323132 is about 47130.9148224390. The cubic root of 2221323132 is about 1304.7798656886.

Adding to 2221323132 its reverse (2313231222), we get a palindrome (4534554354).

The spelling of 2221323132 in words is "two billion, two hundred twenty-one million, three hundred twenty-three thousand, one hundred thirty-two".