221424300 has 72 divisors (see below), whose sum is σ = 711846800. Its totient is φ = 59045760.

The previous prime is 221424277. The next prime is 221424319. The reversal of 221424300 is 3424122.

221424300 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 (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38305 + ... + 43704.

Almost surely, 2^221424300 is an apocalyptic number.

221424300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221424300 is an abundant number, since it is smaller than the sum of its proper divisors (490422500).

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

221424300 is a wasteful number, since it uses less digits than its factorization.

221424300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82032 (or 82019 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 221424300 is about 14880.3326575719. The cubic root of 221424300 is about 604.9810343985.

Adding to 221424300 its reverse (3424122), we get a palindrome (224848422).

The spelling of 221424300 in words is "two hundred twenty-one million, four hundred twenty-four thousand, three hundred".