8216539 has 2 divisors, whose sum is σ = 8216540. Its totient is φ = 8216538.

The previous prime is 8216521. The next prime is 8216557. The reversal of 8216539 is 9356128.

It is a balanced prime because it is at equal distance from previous prime (8216521) and next prime (8216557).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8216539 is a prime.

It is not a weakly prime, because it can be changed into another prime (8216839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4108269 + 4108270.

It is an arithmetic number, because the mean of its divisors is an integer number (4108270).

Almost surely, 2^8216539 is an apocalyptic number.

8216539 is a deficient number, since it is larger than the sum of its proper divisors (1).

8216539 is an equidigital number, since it uses as much as digits as its factorization.

8216539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 8216539 is about 2866.4505926319. The cubic root of 8216539 is about 201.7884512075.

The spelling of 8216539 in words is "eight million, two hundred sixteen thousand, five hundred thirty-nine".