82136215 has 16 divisors (see below), whose sum is σ = 113084928. Its totient is φ = 56101536.

The previous prime is 82136179. The next prime is 82136237. The reversal of 82136215 is 51263128.

It is a cyclic number.

It is not a de Polignac number, because 82136215 - 2¹³ = 82128023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4744 + ... + 13666.

It is an arithmetic number, because the mean of its divisors is an integer number (7067808).

Almost surely, 2^82136215 is an apocalyptic number.

82136215 is a deficient number, since it is larger than the sum of its proper divisors (30948713).

82136215 is a wasteful number, since it uses less digits than its factorization.

82136215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9198.

The product of its digits is 2880, while the sum is 28.

The square root of 82136215 is about 9062.9032324085. The cubic root of 82136215 is about 434.6885779125.

The spelling of 82136215 in words is "eighty-two million, one hundred thirty-six thousand, two hundred fifteen".