224001321 has 4 divisors (see below), whose sum is σ = 298668432. Its totient is φ = 149334212.

The previous prime is 224001311. The next prime is 224001329. The reversal of 224001321 is 123100422.

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 224001321 - 2⁵ = 224001289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 224001321.

It is not an unprimeable number, because it can be changed into a prime (224001329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37333551 + ... + 37333556.

It is an arithmetic number, because the mean of its divisors is an integer number (74667108).

Almost surely, 2^224001321 is an apocalyptic number.

It is an amenable number.

224001321 is a deficient number, since it is larger than the sum of its proper divisors (74667111).

224001321 is an equidigital number, since it uses as much as digits as its factorization.

224001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74667110.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 224001321 is about 14966.6736785433. The cubic root of 224001321 is about 607.3189882222.

Adding to 224001321 its reverse (123100422), we get a palindrome (347101743).

The spelling of 224001321 in words is "two hundred twenty-four million, one thousand, three hundred twenty-one".