224431221 has 48 divisors (see below), whose sum is σ = 358689600. Its totient is φ = 124411392.

The previous prime is 224431199. The next prime is 224431223. The reversal of 224431221 is 122134422.

It is not a de Polignac number, because 224431221 - 2¹⁴ = 224414837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224431223) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 979935 + ... + 980163.

It is an arithmetic number, because the mean of its divisors is an integer number (7472700).

Almost surely, 2^224431221 is an apocalyptic number.

224431221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

224431221 is a deficient number, since it is larger than the sum of its proper divisors (134258379).

224431221 is a wasteful number, since it uses less digits than its factorization.

224431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 411 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 224431221 is about 14981.0287029963. The cubic root of 224431221 is about 607.7072591266.

Adding to 224431221 its reverse (122134422), we get a palindrome (346565643).

The spelling of 224431221 in words is "two hundred twenty-four million, four hundred thirty-one thousand, two hundred twenty-one".