2221323552 has 144 divisors (see below), whose sum is σ = 7268107392. Its totient is φ = 630374400.

The previous prime is 2221323551. The next prime is 2221323553. The reversal of 2221323552 is 2553231222.

It is an interprime number because it is at equal distance from previous prime (2221323551) and next prime (2221323553).

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (2221323551) 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, 300768 + ... + 308064.

It is an arithmetic number, because the mean of its divisors is an integer number (50472968).

Almost surely, 2^2221323552 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 2221323552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3634053696).

2221323552 is an abundant number, since it is smaller than the sum of its proper divisors (5046783840).

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

2221323552 is a wasteful number, since it uses less digits than its factorization.

2221323552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7471 (or 7460 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 2221323552 is about 47130.9192781130. The cubic root of 2221323552 is about 1304.7799479230.

Adding to 2221323552 its reverse (2553231222), we get a palindrome (4774554774).

The spelling of 2221323552 in words is "two billion, two hundred twenty-one million, three hundred twenty-three thousand, five hundred fifty-two".