221443614220 has 96 divisors (see below), whose sum is σ = 478809999360. Its totient is φ = 85986673920.

The previous prime is 221443614187. The next prime is 221443614229. The reversal of 221443614220 is 22416344122.

It is not an unprimeable number, because it can be changed into a prime (221443614229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66477955 + ... + 66481285.

It is an arithmetic number, because the mean of its divisors is an integer number (4987604160).

Almost surely, 2^221443614220 is an apocalyptic number.

221443614220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221443614220 is an abundant number, since it is smaller than the sum of its proper divisors (257366385140).

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

221443614220 is a wasteful number, since it uses less digits than its factorization.

221443614220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943 (or 3941 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 221443614220 its reverse (22416344122), we get a palindrome (243859958342).

The spelling of 221443614220 in words is "two hundred twenty-one billion, four hundred forty-three million, six hundred fourteen thousand, two hundred twenty".