8216105 has 4 divisors (see below), whose sum is σ = 9859332. Its totient is φ = 6572880.

The previous prime is 8216101. The next prime is 8216107. The reversal of 8216105 is 5016128.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4405801 + 3810304 = 2099^2 + 1952^2 .

It is not a de Polignac number, because 8216105 - 2² = 8216101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8216101) 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, 821606 + ... + 821615.

It is an arithmetic number, because the mean of its divisors is an integer number (2464833).

Almost surely, 2^8216105 is an apocalyptic number.

It is an amenable number.

8216105 is a deficient number, since it is larger than the sum of its proper divisors (1643227).

8216105 is a wasteful number, since it uses less digits than its factorization.

8216105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643226.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 8216105 is about 2866.3748882517. The cubic root of 8216105 is about 201.7848983032.

Adding to 8216105 its sum of digits (23), we get a palindrome (8216128).

The spelling of 8216105 in words is "eight million, two hundred sixteen thousand, one hundred five".