8216813 has 8 divisors (see below), whose sum is σ = 9098400. Its totient is φ = 7357680.

The previous prime is 8216809. The next prime is 8216821. The reversal of 8216813 is 3186128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8216813 - 2² = 8216809 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 (8216833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4838 + ... + 6311.

It is an arithmetic number, because the mean of its divisors is an integer number (1137300).

Almost surely, 2^8216813 is an apocalyptic number.

It is an amenable number.

8216813 is a deficient number, since it is larger than the sum of its proper divisors (881587).

8216813 is a wasteful number, since it uses less digits than its factorization.

8216813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11227.

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

The square root of 8216813 is about 2866.4983865336. The cubic root of 8216813 is about 201.7906942209.

The spelling of 8216813 in words is "eight million, two hundred sixteen thousand, eight hundred thirteen".