82165205 has 4 divisors (see below), whose sum is σ = 98598252. Its totient is φ = 65732160.

The previous prime is 82165201. The next prime is 82165277. The reversal of 82165205 is 50256128.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23290276 + 58874929 = 4826^2 + 7673^2 .

It is not a de Polignac number, because 82165205 - 2² = 82165201 is a prime.

It is a super-2 number, since 2×82165205² = 13502241825384050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82165201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8216516 + ... + 8216525.

It is an arithmetic number, because the mean of its divisors is an integer number (24649563).

Almost surely, 2^82165205 is an apocalyptic number.

It is an amenable number.

82165205 is a deficient number, since it is larger than the sum of its proper divisors (16433047).

82165205 is a wasteful number, since it uses less digits than its factorization.

82165205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16433046.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 82165205 is about 9064.5024684204. The cubic root of 82165205 is about 434.7397130485.

The spelling of 82165205 in words is "eighty-two million, one hundred sixty-five thousand, two hundred five".