82215385 has 16 divisors (see below), whose sum is σ = 115056000. Its totient is φ = 56375088.

The previous prime is 82215347. The next prime is 82215403. The reversal of 82215385 is 58351228.

It is not a de Polignac number, because 82215385 - 2⁷ = 82215257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82215385.

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 15 ways as a sum of consecutive naturals, for example, 22255 + ... + 25684.

It is an arithmetic number, because the mean of its divisors is an integer number (7191000).

Almost surely, 2^82215385 is an apocalyptic number.

It is an amenable number.

82215385 is a deficient number, since it is larger than the sum of its proper divisors (32840615).

82215385 is an equidigital number, since it uses as much as digits as its factorization.

82215385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47965 (or 47951 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 82215385 is about 9067.2699860542. The cubic root of 82215385 is about 434.8281965670.

The spelling of 82215385 in words is "eighty-two million, two hundred fifteen thousand, three hundred eighty-five".