325501220 has 96 divisors (see below), whose sum is σ = 778619520. Its totient is φ = 113218560.

The previous prime is 325501219. The next prime is 325501237. The reversal of 325501220 is 22105523.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 325501192 and 325501201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1039784 + ... + 1040096.

It is an arithmetic number, because the mean of its divisors is an integer number (8110620).

Almost surely, 2^325501220 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 325501220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389309760).

325501220 is an abundant number, since it is smaller than the sum of its proper divisors (453118300).

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

325501220 is a wasteful number, since it uses less digits than its factorization.

325501220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 325501220 is about 18041.6523633508. The cubic root of 325501220 is about 687.8876940583.

Adding to 325501220 its reverse (22105523), we get a palindrome (347606743).

The spelling of 325501220 in words is "three hundred twenty-five million, five hundred one thousand, two hundred twenty".