82185513 has 8 divisors (see below), whose sum is σ = 112129248. Its totient is φ = 53516064.

The previous prime is 82185491. The next prime is 82185527. The reversal of 82185513 is 31558128.

It is a happy number.

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

It is not a de Polignac number, because 82185513 - 2¹⁰ = 82184489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82185533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318420 + ... + 318677.

It is an arithmetic number, because the mean of its divisors is an integer number (14016156).

Almost surely, 2^82185513 is an apocalyptic number.

It is an amenable number.

82185513 is a deficient number, since it is larger than the sum of its proper divisors (29943735).

82185513 is a wasteful number, since it uses less digits than its factorization.

82185513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637143.

The product of its digits is 9600, while the sum is 33.

The square root of 82185513 is about 9065.6225930710. The cubic root of 82185513 is about 434.7755269384.

It can be divided in two parts, 8218 and 5513, that added together give a palindrome (13731).

The spelling of 82185513 in words is "eighty-two million, one hundred eighty-five thousand, five hundred thirteen".