82165215 has 32 divisors (see below), whose sum is σ = 150969600. Its totient is φ = 37739520.

The previous prime is 82165201. The next prime is 82165277. The reversal of 82165215 is 51256128.

It is not a de Polignac number, because 82165215 - 2⁵ = 82165183 is a prime.

It is a super-2 number, since 2×82165215² = 13502245111992450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9970 + ... + 16239.

It is an arithmetic number, because the mean of its divisors is an integer number (4717800).

Almost surely, 2^82165215 is an apocalyptic number.

82165215 is a deficient number, since it is larger than the sum of its proper divisors (68804385).

82165215 is a wasteful number, since it uses less digits than its factorization.

82165215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26247.

The product of its digits is 4800, while the sum is 30.

The square root of 82165215 is about 9064.5030200227. The cubic root of 82165215 is about 434.7397306853.

It can be divided in two parts, 8216 and 5215, that added together give a palindrome (13431).

The spelling of 82165215 in words is "eighty-two million, one hundred sixty-five thousand, two hundred fifteen".