6523220 has 48 divisors (see below), whose sum is σ = 15120000. Its totient is φ = 2344320.

The previous prime is 6523201. The next prime is 6523243. The reversal of 6523220 is 223256.

It is a happy number.

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 = 6523192 and 6523201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32681 + ... + 32879.

It is an arithmetic number, because the mean of its divisors is an integer number (315000).

Almost surely, 2^6523220 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 6523220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7560000).

6523220 is an abundant number, since it is smaller than the sum of its proper divisors (8596780).

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

6523220 is a wasteful number, since it uses less digits than its factorization.

6523220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 6523220 is about 2554.0595137937. The cubic root of 6523220 is about 186.8475217145.

Adding to 6523220 its reverse (223256), we get a palindrome (6746476).

The spelling of 6523220 in words is "six million, five hundred twenty-three thousand, two hundred twenty".