82218218 has 8 divisors (see below), whose sum is σ = 126660612. Its totient is φ = 39998016.

The previous prime is 82218217. The next prime is 82218247. The reversal of 82218218 is 81281228.

It can be written as a sum of positive squares in 2 ways, for example, as 74528689 + 7689529 = 8633^2 + 2773^2 .

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

It is not an unprimeable number, because it can be changed into a prime (82218217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555455 + ... + 555602.

Almost surely, 2^82218218 is an apocalyptic number.

82218218 is a deficient number, since it is larger than the sum of its proper divisors (44442394).

82218218 is a wasteful number, since it uses less digits than its factorization.

82218218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111096.

The product of its digits is 4096, while the sum is 32.

The square root of 82218218 is about 9067.4262059308. The cubic root of 82218218 is about 434.8331909855.

The spelling of 82218218 in words is "eighty-two million, two hundred eighteen thousand, two hundred eighteen".