224213321 has 4 divisors (see below), whose sum is σ = 224560512. Its totient is φ = 223866132.

The previous prime is 224213317. The next prime is 224213333. The reversal of 224213321 is 123312422.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123312422 = 2 ⋅61656211.

It is a cyclic number.

It is not a de Polignac number, because 224213321 - 2² = 224213317 is a prime.

It is a super-2 number, since 2×224213321² = 100543226627698082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 224213293 and 224213302.

It is not an unprimeable number, because it can be changed into a prime (224213351) 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, 172625 + ... + 173918.

It is an arithmetic number, because the mean of its divisors is an integer number (56140128).

Almost surely, 2^224213321 is an apocalyptic number.

It is an amenable number.

224213321 is a deficient number, since it is larger than the sum of its proper divisors (347191).

224213321 is an equidigital number, since it uses as much as digits as its factorization.

224213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347190.

The product of its digits is 576, while the sum is 20.

The square root of 224213321 is about 14973.7544056259. The cubic root of 224213321 is about 607.5105213620.

Adding to 224213321 its reverse (123312422), we get a palindrome (347525743).

The spelling of 224213321 in words is "two hundred twenty-four million, two hundred thirteen thousand, three hundred twenty-one".