224430021 has 40 divisors (see below), whose sum is σ = 352313280. Its totient is φ = 142103808.

The previous prime is 224430001. The next prime is 224430047. The reversal of 224430021 is 120034422.

It is not a de Polignac number, because 224430021 - 2¹³ = 224421829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224429976 and 224430003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224430001) 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 39 ways as a sum of consecutive naturals, for example, 333141 + ... + 333813.

It is an arithmetic number, because the mean of its divisors is an integer number (8807832).

Almost surely, 2^224430021 is an apocalyptic number.

It is an amenable number.

224430021 is a deficient number, since it is larger than the sum of its proper divisors (127883259).

224430021 is a wasteful number, since it uses less digits than its factorization.

224430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 878 counting only the distinct ones).

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

The square root of 224430021 is about 14980.9886522886. The cubic root of 224430021 is about 607.7061760182.

Adding to 224430021 its reverse (120034422), we get a palindrome (344464443).

The spelling of 224430021 in words is "two hundred twenty-four million, four hundred thirty thousand, twenty-one".