221444300 has 72 divisors (see below), whose sum is σ = 599128320. Its totient is φ = 69019200.

The previous prime is 221444273. The next prime is 221444303. The reversal of 221444300 is 3444122.

221444300 is digitally balanced in base 3, 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 (20).

It is not an unprimeable number, because it can be changed into a prime (221444303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6680 + ... + 22079.

Almost surely, 2^221444300 is an apocalyptic number.

221444300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221444300 is an abundant number, since it is smaller than the sum of its proper divisors (377684020).

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

221444300 is a wasteful number, since it uses less digits than its factorization.

221444300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28791 (or 28784 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 221444300 is about 14881.0046703843. The cubic root of 221444300 is about 604.9992486843. Note that the first 3 decimals are identical.

Adding to 221444300 its reverse (3444122), we get a palindrome (224888422).

The spelling of 221444300 in words is "two hundred twenty-one million, four hundred forty-four thousand, three hundred".