224242021 has 8 divisors (see below), whose sum is σ = 227015360. Its totient is φ = 221480352.

The previous prime is 224241991. The next prime is 224242027. The reversal of 224242021 is 120242422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 224242021 - 2¹⁹ = 223717733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 224242021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224242027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39466 + ... + 44788.

It is an arithmetic number, because the mean of its divisors is an integer number (28376920).

Almost surely, 2^224242021 is an apocalyptic number.

It is an amenable number.

224242021 is a deficient number, since it is larger than the sum of its proper divisors (2773339).

224242021 is a wasteful number, since it uses less digits than its factorization.

224242021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5835.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 224242021 is about 14974.7127184464. The cubic root of 224242021 is about 607.5364413327.

Adding to 224242021 its reverse (120242422), we get a palindrome (344484443).

The spelling of 224242021 in words is "two hundred twenty-four million, two hundred forty-two thousand, twenty-one".