6561232 has 40 divisors (see below), whose sum is σ = 13570560. Its totient is φ = 3064320.

The previous prime is 6561223. The next prime is 6561259. The reversal of 6561232 is 2321656.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 6561197 and 6561206.

It is a congruent number.

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, 34257 + ... + 34447.

It is an arithmetic number, because the mean of its divisors is an integer number (339264).

Almost surely, 2^6561232 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 6561232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6785280).

6561232 is an abundant number, since it is smaller than the sum of its proper divisors (7009328).

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

6561232 is a wasteful number, since it uses less digits than its factorization.

6561232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 325 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 6561232 is about 2561.4901912754. The cubic root of 6561232 is about 187.2097506305.

Adding to 6561232 its reverse (2321656), we get a palindrome (8882888).

The spelling of 6561232 in words is "six million, five hundred sixty-one thousand, two hundred thirty-two".