82185515 has 8 divisors (see below), whose sum is σ = 98859408. Its totient is φ = 65590560.

The previous prime is 82185491. The next prime is 82185527. The reversal of 82185515 is 51558128.

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

It is not a de Polignac number, because 82185515 - 2¹² = 82181419 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17417 + ... + 21626.

It is an arithmetic number, because the mean of its divisors is an integer number (12357426).

Almost surely, 2^82185515 is an apocalyptic number.

82185515 is a deficient number, since it is larger than the sum of its proper divisors (16673893).

82185515 is a wasteful number, since it uses less digits than its factorization.

82185515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39469.

The product of its digits is 16000, while the sum is 35.

The square root of 82185515 is about 9065.6227033779. The cubic root of 82185515 is about 434.7755304652.

The spelling of 82185515 in words is "eighty-two million, one hundred eighty-five thousand, five hundred fifteen".