6520220 has 24 divisors (see below), whose sum is σ = 15648864. Its totient is φ = 2235456.

The previous prime is 6520207. The next prime is 6520223. The reversal of 6520220 is 220256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520223) 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, 23147 + ... + 23426.

It is an arithmetic number, because the mean of its divisors is an integer number (652036).

Almost surely, 2^6520220 is an apocalyptic number.

It is an amenable number.

6520220 is an abundant number, since it is smaller than the sum of its proper divisors (9128644).

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

6520220 is a wasteful number, since it uses less digits than its factorization.

6520220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46589 (or 46587 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 6520220 is about 2553.4721459221. The cubic root of 6520220 is about 186.8188738730.

Adding to 6520220 its reverse (220256), we get a palindrome (6740476).

The spelling of 6520220 in words is "six million, five hundred twenty thousand, two hundred twenty".