321224224 has 12 divisors (see below), whose sum is σ = 632410254. Its totient is φ = 160612096.

The previous prime is 321224177. The next prime is 321224227. The reversal of 321224224 is 422422123.

It can be written as a sum of positive squares in only one way, i.e., 258180624 + 63043600 = 16068^2 + 7940^2 .

It is a junction number, because it is equal to n+sod(n) for n = 321224195 and 321224204.

It is not an unprimeable number, because it can be changed into a prime (321224227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5019097 + ... + 5019160.

Almost surely, 2^321224224 is an apocalyptic number.

It is an amenable number.

321224224 is a deficient number, since it is larger than the sum of its proper divisors (311186030).

321224224 is a wasteful number, since it uses less digits than its factorization.

321224224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10038267 (or 10038259 counting only the distinct ones).

The product of its digits is 1536, while the sum is 22.

The square root of 321224224 is about 17922.7292564498. The cubic root of 321224224 is about 684.8615160405.

Adding to 321224224 its reverse (422422123), we get a palindrome (743646347).

The spelling of 321224224 in words is "three hundred twenty-one million, two hundred twenty-four thousand, two hundred twenty-four".