9221721600 has 1080 divisors, whose sum is σ = 39695796360. Its totient is φ = 1878589440.

The previous prime is 9221721589. The next prime is 9221721701. The reversal of 9221721600 is 61271229.

It is a super-3 number, since 3×9221721600³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 107 ways as a sum of consecutive naturals, for example, 317990386 + ... + 317990414.

It is an arithmetic number, because the mean of its divisors is an integer number (36755367).

Almost surely, 2^9221721600 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 9221721600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19847898180).

9221721600 is an abundant number, since it is smaller than the sum of its proper divisors (30474074760).

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

9221721600 is a wasteful number, since it uses less digits than its factorization.

9221721600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 9221721600 is about 96029.7953762269. The cubic root of 9221721600 is about 2097.0269039069.

Adding to 9221721600 its reverse (61271229), we get a palindrome (9282992829).

The spelling of 9221721600 in words is "nine billion, two hundred twenty-one million, seven hundred twenty-one thousand, six hundred".