224032421 has 4 divisors (see below), whose sum is σ = 224425344. Its totient is φ = 223639500.

The previous prime is 224032411. The next prime is 224032433. The reversal of 224032421 is 124230422.

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 not a de Polignac number, because 224032421 - 2¹⁰ = 224031397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 224032393 and 224032402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224032411) 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, 195605 + ... + 196746.

It is an arithmetic number, because the mean of its divisors is an integer number (56106336).

Almost surely, 2^224032421 is an apocalyptic number.

It is an amenable number.

224032421 is a deficient number, since it is larger than the sum of its proper divisors (392923).

224032421 is an equidigital number, since it uses as much as digits as its factorization.

224032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392922.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 224032421 is about 14967.7126174977. The cubic root of 224032421 is about 607.3470933340.

Adding to 224032421 its reverse (124230422), we get a palindrome (348262843).

The spelling of 224032421 in words is "two hundred twenty-four million, thirty-two thousand, four hundred twenty-one".