325221620 has 36 divisors (see below), whose sum is σ = 705748932. Its totient is φ = 125884800.

The previous prime is 325221593. The next prime is 325221641. The reversal of 325221620 is 26122523.

It can be written as a sum of positive squares in 2 ways, for example, as 176039824 + 149181796 = 13268^2 + 12214^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10760 + ... + 27680.

It is an arithmetic number, because the mean of its divisors is an integer number (19604137).

Almost surely, 2^325221620 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 325221620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352874466).

325221620 is an abundant number, since it is smaller than the sum of its proper divisors (380527312).

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

325221620 is a wasteful number, since it uses less digits than its factorization.

325221620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16992 (or 16959 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 325221620 is about 18033.9019626924. The cubic root of 325221620 is about 687.6906763677.

The spelling of 325221620 in words is "three hundred twenty-five million, two hundred twenty-one thousand, six hundred twenty".