224143421 has 4 divisors (see below), whose sum is σ = 224708412. Its totient is φ = 223578432.

The previous prime is 224143417. The next prime is 224143427. The reversal of 224143421 is 124341422.

224143421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180768025 + 43375396 = 13445^2 + 6586^2 .

It is a cyclic number.

It is not a de Polignac number, because 224143421 - 2² = 224143417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224143427) 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, 281900 + ... + 282693.

It is an arithmetic number, because the mean of its divisors is an integer number (56177103).

Almost surely, 2^224143421 is an apocalyptic number.

It is an amenable number.

224143421 is a deficient number, since it is larger than the sum of its proper divisors (564991).

224143421 is an equidigital number, since it uses as much as digits as its factorization.

224143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564990.

The product of its digits is 1536, while the sum is 23.

The square root of 224143421 is about 14971.4201397195. The cubic root of 224143421 is about 607.4473829798.

Adding to 224143421 its reverse (124341422), we get a palindrome (348484843).

The spelling of 224143421 in words is "two hundred twenty-four million, one hundred forty-three thousand, four hundred twenty-one".