221224423200 has 144 divisors (see below), whose sum is σ = 785547909216. Its totient is φ = 53630156800.

The previous prime is 221224423139. The next prime is 221224423219. The reversal of 221224423200 is 2324422122.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 23 ways as a sum of consecutive naturals, for example, 4163457 + ... + 4216256.

It is an arithmetic number, because the mean of its divisors is an integer number (5455193814).

Almost surely, 2^221224423200 is an apocalyptic number.

221224423200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221224423200 is an abundant number, since it is smaller than the sum of its proper divisors (564323486016).

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

221224423200 is a wasteful number, since it uses less digits than its factorization.

221224423200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8379747 (or 8379734 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 221224423200 its reverse (2324422122), we get a palindrome (223548845322).

The spelling of 221224423200 in words is "two hundred twenty-one billion, two hundred twenty-four million, four hundred twenty-three thousand, two hundred".