8213816 has 16 divisors (see below), whose sum is σ = 16585800. Its totient is φ = 3790944.

The previous prime is 8213813. The next prime is 8213819. The reversal of 8213816 is 6183128.

It is an interprime number because it is at equal distance from previous prime (8213813) and next prime (8213819).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8213813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39386 + ... + 39593.

Almost surely, 2^8213816 is an apocalyptic number.

It is an amenable number.

8213816 is an abundant number, since it is smaller than the sum of its proper divisors (8371984).

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

8213816 is a wasteful number, since it uses less digits than its factorization.

8213816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78998 (or 78994 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 8213816 is about 2865.9755756112. The cubic root of 8213816 is about 201.7661575280.

The spelling of 8213816 in words is "eight million, two hundred thirteen thousand, eight hundred sixteen".