321325240 has 64 divisors (see below), whose sum is σ = 746127360. Its totient is φ = 124467840.

The previous prime is 321325219. The next prime is 321325259. The reversal of 321325240 is 42523123.

It is a super-2 number, since 2×321325240² = 206499819722115200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217705 + ... + 219175.

It is an arithmetic number, because the mean of its divisors is an integer number (11658240).

Almost surely, 2^321325240 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 321325240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373063680).

321325240 is an abundant number, since it is smaller than the sum of its proper divisors (424802120).

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

321325240 is a wasteful number, since it uses less digits than its factorization.

321325240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 321325240 is about 17925.5471325145. The cubic root of 321325240 is about 684.9332984229.

Adding to 321325240 its reverse (42523123), we get a palindrome (363848363).

The spelling of 321325240 in words is "three hundred twenty-one million, three hundred twenty-five thousand, two hundred forty".