8563213 has 4 divisors (see below), whose sum is σ = 8569408. Its totient is φ = 8557020.

The previous prime is 8563187. The next prime is 8563237. The reversal of 8563213 is 3123658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3123658 = 2 ⋅1561829.

It is a cyclic number.

It is not a de Polignac number, because 8563213 - 2¹³ = 8555021 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 (8563273) 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, 28 + ... + 4138.

It is an arithmetic number, because the mean of its divisors is an integer number (2142352).

Almost surely, 2^8563213 is an apocalyptic number.

It is an amenable number.

8563213 is a deficient number, since it is larger than the sum of its proper divisors (6195).

8563213 is a wasteful number, since it uses less digits than its factorization.

8563213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6194.

The product of its digits is 4320, while the sum is 28.

The square root of 8563213 is about 2926.2968065458. The cubic root of 8563213 is about 204.5874152778.

The spelling of 8563213 in words is "eight million, five hundred sixty-three thousand, two hundred thirteen".