3251065220 has 96 divisors (see below), whose sum is σ = 7530012672. Its totient is φ = 1171749888.

The previous prime is 3251065217. The next prime is 3251065241. The reversal of 3251065220 is 225601523.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 3251065220.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 1954109 + ... + 1955771.

It is an arithmetic number, because the mean of its divisors is an integer number (78437632).

Almost surely, 2^3251065220 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 3251065220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3765006336).

3251065220 is an abundant number, since it is smaller than the sum of its proper divisors (4278947452).

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

3251065220 is a wasteful number, since it uses less digits than its factorization.

3251065220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861 (or 1859 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 3251065220 is about 57018.1130869832. The cubic root of 3251065220 is about 1481.4098478115.

Adding to 3251065220 its reverse (225601523), we get a palindrome (3476666743).

The spelling of 3251065220 in words is "three billion, two hundred fifty-one million, sixty-five thousand, two hundred twenty".