3205120520 has 32 divisors (see below), whose sum is σ = 8241739200. Its totient is φ = 1098898368.

The previous prime is 3205120493. The next prime is 3205120537. The reversal of 3205120520 is 250215023.

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 = 3205120492 and 3205120501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5723150 + ... + 5723709.

It is an arithmetic number, because the mean of its divisors is an integer number (257554350).

Almost surely, 2^3205120520 is an apocalyptic number.

It is an amenable number.

3205120520 is an abundant number, since it is smaller than the sum of its proper divisors (5036618680).

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

3205120520 is a wasteful number, since it uses less digits than its factorization.

3205120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11446877 (or 11446873 counting only the distinct ones).

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

The square root of 3205120520 is about 56613.7838339746. The cubic root of 3205120520 is about 1474.3981871228.

Adding to 3205120520 its reverse (250215023), we get a palindrome (3455335543).

The spelling of 3205120520 in words is "three billion, two hundred five million, one hundred twenty thousand, five hundred twenty".