224021 has 4 divisors (see below), whose sum is σ = 256032. Its totient is φ = 192012.

The previous prime is 224011. The next prime is 224027. The reversal of 224021 is 120422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 223993 and 224011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15995 + ... + 16008.

It is an arithmetic number, because the mean of its divisors is an integer number (64008).

2²²⁴⁰²¹ is an apocalyptic number.

It is an amenable number.

224021 is a deficient number, since it is larger than the sum of its proper divisors (32011).

224021 is an equidigital number, since it uses as much as digits as its factorization.

224021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32010.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 224021 is about 473.3085674272. The cubic root of 224021 is about 60.7336772463.

Adding to 224021 its reverse (120422), we get a palindrome (344443).

The spelling of 224021 in words is "two hundred twenty-four thousand, twenty-one", and thus it is an iban number.