321613424 has 40 divisors (see below), whose sum is σ = 688408320. Its totient is φ = 144331200.

The previous prime is 321613421. The next prime is 321613427. The reversal of 321613424 is 424316123.

It is an interprime number because it is at equal distance from previous prime (321613421) and next prime (321613427).

It is a junction number, because it is equal to n+sod(n) for n = 321613393 and 321613402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321613421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2339 + ... + 25469.

It is an arithmetic number, because the mean of its divisors is an integer number (17210208).

Almost surely, 2^321613424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321613424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344204160).

321613424 is an abundant number, since it is smaller than the sum of its proper divisors (366794896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321613424 is a wasteful number, since it uses less digits than its factorization.

321613424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23229 (or 23223 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 321613424 is about 17933.5836909414. The cubic root of 321613424 is about 685.1380005056.

Adding to 321613424 its reverse (424316123), we get a palindrome (745929547).

The spelling of 321613424 in words is "three hundred twenty-one million, six hundred thirteen thousand, four hundred twenty-four".