8216523 has 24 divisors (see below), whose sum is σ = 13898976. Its totient is φ = 4579200.

The previous prime is 8216521. The next prime is 8216539. The reversal of 8216523 is 3256128.

8216523 is a `hidden beast` number, since 8 + 2 + 1 + 652 + 3 = 666.

8216523 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8216523 - 2¹ = 8216521 is a prime.

It is a super-2 number, since 2×8216523² = 135022500419058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8216521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 993 + ... + 4173.

It is an arithmetic number, because the mean of its divisors is an integer number (579124).

Almost surely, 2^8216523 is an apocalyptic number.

8216523 is a deficient number, since it is larger than the sum of its proper divisors (5682453).

8216523 is a wasteful number, since it uses less digits than its factorization.

8216523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235 (or 3232 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 8216523 is about 2866.4478017225. The cubic root of 8216523 is about 201.7883202271.

The spelling of 8216523 in words is "eight million, two hundred sixteen thousand, five hundred twenty-three".