221434343200 has 432 divisors, whose sum is σ = 667336912704. Its totient is φ = 70251724800.

The previous prime is 221434343177. The next prime is 221434343209. The reversal of 221434343200 is 2343434122.

221434343200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (221434343209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 98721279 + ... + 98723521.

It is an arithmetic number, because the mean of its divisors is an integer number (1544761372).

Almost surely, 2^221434343200 is an apocalyptic number.

221434343200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221434343200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333668456352).

221434343200 is an abundant number, since it is smaller than the sum of its proper divisors (445902569504).

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

221434343200 is a wasteful number, since it uses less digits than its factorization.

221434343200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365 (or 2335 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 221434343200 its reverse (2343434122), we get a palindrome (223777777322).

The spelling of 221434343200 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred forty-three thousand, two hundred".