82266815 has 4 divisors (see below), whose sum is σ = 98720184. Its totient is φ = 65813448.

The previous prime is 82266809. The next prime is 82266817. The reversal of 82266815 is 51866228.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82266815 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82266817) 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, 8226677 + ... + 8226686.

It is an arithmetic number, because the mean of its divisors is an integer number (24680046).

Almost surely, 2^82266815 is an apocalyptic number.

82266815 is a deficient number, since it is larger than the sum of its proper divisors (16453369).

82266815 is a wasteful number, since it uses less digits than its factorization.

82266815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16453368.

The product of its digits is 46080, while the sum is 38.

The square root of 82266815 is about 9070.1055671916. The cubic root of 82266815 is about 434.9188468860.

The spelling of 82266815 in words is "eighty-two million, two hundred sixty-six thousand, eight hundred fifteen".