82820218 has 16 divisors (see below), whose sum is σ = 134467200. Its totient is φ = 38030256.

The previous prime is 82820197. The next prime is 82820237. The reversal of 82820218 is 81202828.

It is a self number, because there is not a number n which added to its sum of digits gives 82820218.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2830 + ... + 13177.

It is an arithmetic number, because the mean of its divisors is an integer number (8404200).

Almost surely, 2^82820218 is an apocalyptic number.

82820218 is a deficient number, since it is larger than the sum of its proper divisors (51646982).

82820218 is a wasteful number, since it uses less digits than its factorization.

82820218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16221.

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 82820218 is about 9100.5614112537. The cubic root of 82820218 is about 435.8918909637.

It can be divided in two parts, 82820 and 218, that added together give a palindrome (83038).

The spelling of 82820218 in words is "eighty-two million, eight hundred twenty thousand, two hundred eighteen".