6561022 has 16 divisors (see below), whose sum is σ = 10648512. Its totient is φ = 3013920.

The previous prime is 6561019. The next prime is 6561073. The reversal of 6561022 is 2201656.

It is a junction number, because it is equal to n+sod(n) for n = 6560984 and 6561002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6747 + ... + 7657.

It is an arithmetic number, because the mean of its divisors is an integer number (665532).

Almost surely, 2^6561022 is an apocalyptic number.

6561022 is a deficient number, since it is larger than the sum of its proper divisors (4087490).

6561022 is a wasteful number, since it uses less digits than its factorization.

6561022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 6561022 is about 2561.4491991839. The cubic root of 6561022 is about 187.2077533193.

Adding to 6561022 its reverse (2201656), we get a palindrome (8762678).

The spelling of 6561022 in words is "six million, five hundred sixty-one thousand, twenty-two".