224424021 has 16 divisors (see below), whose sum is σ = 317390400. Its totient is φ = 140567808.

The previous prime is 224424019. The next prime is 224424049. The reversal of 224424021 is 120424422.

It is not a de Polignac number, because 224424021 - 2¹ = 224424019 is a prime.

It is a super-2 number, since 2×224424021² = 100732282403616882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224424001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28015 + ... + 35123.

It is an arithmetic number, because the mean of its divisors is an integer number (19836900).

Almost surely, 2^224424021 is an apocalyptic number.

It is an amenable number.

224424021 is a deficient number, since it is larger than the sum of its proper divisors (92966379).

224424021 is a wasteful number, since it uses less digits than its factorization.

224424021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7748.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 224424021 is about 14980.7883971439. The cubic root of 224424021 is about 607.7007604184.

Adding to 224424021 its reverse (120424422), we get a palindrome (344848443).

The spelling of 224424021 in words is "two hundred twenty-four million, four hundred twenty-four thousand, twenty-one".