6561228 has 24 divisors (see below), whose sum is σ = 15394288. Its totient is φ = 2174976.

The previous prime is 6561223. The next prime is 6561259. The reversal of 6561228 is 8221656.

It is a junction number, because it is equal to n+sod(n) for n = 6561195 and 6561204.

It is not an unprimeable number, because it can be changed into a prime (6561223) 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 7 ways as a sum of consecutive naturals, for example, 900 + ... + 3732.

Almost surely, 2^6561228 is an apocalyptic number.

It is an amenable number.

6561228 is an abundant number, since it is smaller than the sum of its proper divisors (8833060).

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

6561228 is a wasteful number, since it uses less digits than its factorization.

6561228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033 (or 3031 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 6561228 is about 2561.4894104798. The cubic root of 6561228 is about 187.2097125869.

The spelling of 6561228 in words is "six million, five hundred sixty-one thousand, two hundred twenty-eight".