82118315 has 4 divisors (see below), whose sum is σ = 98541984. Its totient is φ = 65694648.

The previous prime is 82118299. The next prime is 82118321. The reversal of 82118315 is 51381128.

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

It is a cyclic number.

It is not a de Polignac number, because 82118315 - 2⁴ = 82118299 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 3 ways as a sum of consecutive naturals, for example, 8211827 + ... + 8211836.

It is an arithmetic number, because the mean of its divisors is an integer number (24635496).

Almost surely, 2^82118315 is an apocalyptic number.

82118315 is a deficient number, since it is larger than the sum of its proper divisors (16423669).

82118315 is a wasteful number, since it uses less digits than its factorization.

82118315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16423668.

The product of its digits is 1920, while the sum is 29.

The square root of 82118315 is about 9061.9156363321. The cubic root of 82118315 is about 434.6569982946.

The spelling of 82118315 in words is "eighty-two million, one hundred eighteen thousand, three hundred fifteen".