82218619 has 12 divisors (see below), whose sum is σ = 95873544. Its totient is φ = 70302624.

The previous prime is 82218607. The next prime is 82218649. The reversal of 82218619 is 91681228.

It is not a de Polignac number, because 82218619 - 2²¹ = 80121467 is a prime.

It is a super-2 number, since 2×82218619² = 13519802620534322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82218649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21087 + ... + 24679.

It is an arithmetic number, because the mean of its divisors is an integer number (7989462).

Almost surely, 2^82218619 is an apocalyptic number.

82218619 is a deficient number, since it is larger than the sum of its proper divisors (13654925).

82218619 is a wasteful number, since it uses less digits than its factorization.

82218619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074 (or 4067 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 82218619 is about 9067.4483180220. The cubic root of 82218619 is about 434.8338979165.

The spelling of 82218619 in words is "eighty-two million, two hundred eighteen thousand, six hundred nineteen".