224421 has 8 divisors (see below), whose sum is σ = 301440. Its totient is φ = 148512.

The previous prime is 224401. The next prime is 224423. The reversal of 224421 is 124422.

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

It is not a de Polignac number, because 224421 - 2¹⁴ = 208037 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 224421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224423) 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, 561 + ... + 873.

It is an arithmetic number, because the mean of its divisors is an integer number (37680).

2²²⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

224421 is a deficient number, since it is larger than the sum of its proper divisors (77019).

224421 is a wasteful number, since it uses less digits than its factorization.

224421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555.

The product of its digits is 128, while the sum is 15.

The square root of 224421 is about 473.7309362919. The cubic root of 224421 is about 60.7698033627.

Adding to 224421 its reverse (124422), we get a palindrome (348843).

Subtracting from 224421 its reverse (124422), we obtain a palindrome (99999).

The spelling of 224421 in words is "two hundred twenty-four thousand, four hundred twenty-one", and thus it is an iban number.