4356221220 has 144 divisors (see below), whose sum is σ = 14251228992. Its totient is φ = 1070726400.

The previous prime is 4356221201. The next prime is 4356221237. The reversal of 4356221220 is 221226534.

It is a happy number.

4356221220 is a `hidden beast` number, since 4 + 3 + 5 + 622 + 12 + 20 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3001495 + ... + 3002945.

It is an arithmetic number, because the mean of its divisors is an integer number (98966868).

Almost surely, 2^4356221220 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 4356221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7125614496).

4356221220 is an abundant number, since it is smaller than the sum of its proper divisors (9895007772).

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

4356221220 is a wasteful number, since it uses less digits than its factorization.

4356221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762 (or 2757 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 4356221220 is about 66001.6758878136. The cubic root of 4356221220 is about 1633.1897367396.

Adding to 4356221220 its reverse (221226534), we get a palindrome (4577447754).

The spelling of 4356221220 in words is "four billion, three hundred fifty-six million, two hundred twenty-one thousand, two hundred twenty".