6530220 has 120 divisors (see below), whose sum is σ = 21344400. Its totient is φ = 1669248.

The previous prime is 6530203. The next prime is 6530221. The reversal of 6530220 is 220356.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 6530193 and 6530202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6530221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46911 + ... + 47049.

It is an arithmetic number, because the mean of its divisors is an integer number (177870).

Almost surely, 2^6530220 is an apocalyptic number.

6530220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6530220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10672200).

6530220 is an abundant number, since it is smaller than the sum of its proper divisors (14814180).

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

6530220 is a wasteful number, since it uses less digits than its factorization.

6530220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 6530220 is about 2555.4295138000. The cubic root of 6530220 is about 186.9143325374.

Adding to 6530220 its reverse (220356), we get a palindrome (6750576).

The spelling of 6530220 in words is "six million, five hundred thirty thousand, two hundred twenty".