3205505220 has 24 divisors (see below), whose sum is σ = 8975414784. Its totient is φ = 854801376.

The previous prime is 3205505213. The next prime is 3205505221. The reversal of 3205505220 is 225055023.

It is not an unprimeable number, because it can be changed into a prime (3205505221) 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, 26712484 + ... + 26712603.

It is an arithmetic number, because the mean of its divisors is an integer number (373975616).

Almost surely, 2^3205505220 is an apocalyptic number.

3205505220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3205505220 is an abundant number, since it is smaller than the sum of its proper divisors (5769909564).

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

3205505220 is a wasteful number, since it uses less digits than its factorization.

3205505220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53425099 (or 53425097 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 3205505220 is about 56617.1813145091. The cubic root of 3205505220 is about 1474.4571738065.

The spelling of 3205505220 in words is "three billion, two hundred five million, five hundred five thousand, two hundred twenty".