82918815 has 32 divisors (see below), whose sum is σ = 152495616. Its totient is φ = 37687680.

The previous prime is 82918747. The next prime is 82918817. The reversal of 82918815 is 51881928.

It is not a de Polignac number, because 82918815 - 2⁸ = 82918559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82918817) 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 31 ways as a sum of consecutive naturals, for example, 16824 + ... + 21186.

It is an arithmetic number, because the mean of its divisors is an integer number (4765488).

Almost surely, 2^82918815 is an apocalyptic number.

82918815 is a deficient number, since it is larger than the sum of its proper divisors (69576801).

82918815 is a wasteful number, since it uses less digits than its factorization.

82918815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4559.

The product of its digits is 46080, while the sum is 42.

The square root of 82918815 is about 9105.9768833443. The cubic root of 82918815 is about 436.0647979753.

The spelling of 82918815 in words is "eighty-two million, nine hundred eighteen thousand, eight hundred fifteen".