82215858 has 8 divisors (see below), whose sum is σ = 164431728. Its totient is φ = 27405284.

The previous prime is 82215857. The next prime is 82215943. The reversal of 82215858 is 85851228.

It is a sphenic number, since it is the product of 3 distinct primes.

82215858 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82215857) by changing a digit.

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, 6851316 + ... + 6851327.

It is an arithmetic number, because the mean of its divisors is an integer number (20553966).

Almost surely, 2^82215858 is an apocalyptic number.

82215858 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82215858 is a wasteful number, since it uses less digits than its factorization.

82215858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13702648.

The product of its digits is 51200, while the sum is 39.

The square root of 82215858 is about 9067.2960688399. The cubic root of 82215858 is about 434.8290304471.

The spelling of 82215858 in words is "eighty-two million, two hundred fifteen thousand, eight hundred fifty-eight".