8228509 has 4 divisors (see below), whose sum is σ = 8236060. Its totient is φ = 8220960.

The previous prime is 8228497. The next prime is 8228513. The reversal of 8228509 is 9058228.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6140484 + 2088025 = 2478^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 8228509 - 2¹⁵ = 8195741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8228569) 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, 1794 + ... + 4435.

It is an arithmetic number, because the mean of its divisors is an integer number (2059015).

Almost surely, 2^8228509 is an apocalyptic number.

It is an amenable number.

8228509 is a deficient number, since it is larger than the sum of its proper divisors (7551).

8228509 is a wasteful number, since it uses less digits than its factorization.

8228509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7550.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 8228509 is about 2868.5377808214. The cubic root of 8228509 is about 201.8863933286.

The spelling of 8228509 in words is "eight million, two hundred twenty-eight thousand, five hundred nine".