82812505 has 8 divisors (see below), whose sum is σ = 99950472. Its totient is φ = 65866368.

The previous prime is 82812481. The next prime is 82812523. The reversal of 82812505 is 50521828.

It can be written as a sum of positive squares in 4 ways, for example, as 51036736 + 31775769 = 7144^2 + 5637^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 82812505 - 2⁵ = 82812473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 47004 + ... + 48733.

It is an arithmetic number, because the mean of its divisors is an integer number (12493809).

Almost surely, 2^82812505 is an apocalyptic number.

It is an amenable number.

82812505 is a deficient number, since it is larger than the sum of its proper divisors (17137967).

82812505 is a wasteful number, since it uses less digits than its factorization.

82812505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95915.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 82812505 is about 9100.1376363218. The cubic root of 82812505 is about 435.8783590887.

The spelling of 82812505 in words is "eighty-two million, eight hundred twelve thousand, five hundred five".