6216564 has 12 divisors (see below), whose sum is σ = 14505344. Its totient is φ = 2072184.

The previous prime is 6216557. The next prime is 6216569. The reversal of 6216564 is 4656126.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6216569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259012 + ... + 259035.

Almost surely, 2^6216564 is an apocalyptic number.

It is an amenable number.

6216564 is an abundant number, since it is smaller than the sum of its proper divisors (8288780).

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

6216564 is a wasteful number, since it uses less digits than its factorization.

6216564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518054 (or 518052 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 6216564 is about 2493.3038322675. The cubic root of 6216564 is about 183.8725093527.

The spelling of 6216564 in words is "six million, two hundred sixteen thousand, five hundred sixty-four".