6565223000 has 128 divisors (see below), whose sum is σ = 18163267200. Its totient is φ = 2173248000.

The previous prime is 6565222991. The next prime is 6565223009. The reversal of 6565223000 is 3225656.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6565222991) and next prime (6565223009).

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565223009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186830 + ... + 219170.

It is an arithmetic number, because the mean of its divisors is an integer number (141900525).

Almost surely, 2^6565223000 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 6565223000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9081633600).

6565223000 is an abundant number, since it is smaller than the sum of its proper divisors (11598044200).

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

6565223000 is a wasteful number, since it uses less digits than its factorization.

6565223000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32398 (or 32384 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 6565223000 is about 81026.0637079206. The cubic root of 6565223000 is about 1872.4770095626.

Adding to 6565223000 its reverse (3225656), we get a palindrome (6568448656).

The spelling of 6565223000 in words is "six billion, five hundred sixty-five million, two hundred twenty-three thousand".