8563512220 has 12 divisors (see below), whose sum is σ = 17983375704. Its totient is φ = 3425404880.

The previous prime is 8563512203. The next prime is 8563512227. The reversal of 8563512220 is 222153658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8563512227) 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, 214087786 + ... + 214087825.

It is an arithmetic number, because the mean of its divisors is an integer number (1498614642).

Almost surely, 2^8563512220 is an apocalyptic number.

It is an amenable number.

8563512220 is an abundant number, since it is smaller than the sum of its proper divisors (9419863484).

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

8563512220 is a wasteful number, since it uses less digits than its factorization.

8563512220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428175620 (or 428175618 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 8563512220 is about 92539.2469171864. The cubic root of 8563512220 is about 2045.8979818141.

Adding to 8563512220 its reverse (222153658), we get a palindrome (8785665878).

The spelling of 8563512220 in words is "eight billion, five hundred sixty-three million, five hundred twelve thousand, two hundred twenty".