4221305500 has 48 divisors (see below), whose sum is σ = 9234415008. Its totient is φ = 1685760000.

The previous prime is 4221305489. The next prime is 4221305507. The reversal of 4221305500 is 55031224.

4221305500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221305507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313915 + ... + 327085.

It is an arithmetic number, because the mean of its divisors is an integer number (192383646).

Almost surely, 2^4221305500 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 4221305500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4617207504).

4221305500 is an abundant number, since it is smaller than the sum of its proper divisors (5013109508).

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

4221305500 is a wasteful number, since it uses less digits than its factorization.

4221305500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13831 (or 13819 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 4221305500 is about 64971.5745538001. The cubic root of 4221305500 is about 1616.1522128746.

Adding to 4221305500 its reverse (55031224), we get a palindrome (4276336724).

The spelling of 4221305500 in words is "four billion, two hundred twenty-one million, three hundred five thousand, five hundred".