82506563 has 4 divisors (see below), whose sum is σ = 82559328. Its totient is φ = 82453800.

The previous prime is 82506539. The next prime is 82506577. The reversal of 82506563 is 36560528.

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

It is a cyclic number.

It is not a de Polignac number, because 82506563 - 2⁶ = 82506499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82506533) 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, 23963 + ... + 27188.

It is an arithmetic number, because the mean of its divisors is an integer number (20639832).

Almost surely, 2^82506563 is an apocalyptic number.

82506563 is a deficient number, since it is larger than the sum of its proper divisors (52765).

82506563 is a wasteful number, since it uses less digits than its factorization.

82506563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52764.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 82506563 is about 9083.3123363672. The cubic root of 82506563 is about 435.3409279566.

The spelling of 82506563 in words is "eighty-two million, five hundred six thousand, five hundred sixty-three".