82218487 has 8 divisors (see below), whose sum is σ = 88615296. Its totient is φ = 75832032.

The previous prime is 82218457. The next prime is 82218503. The reversal of 82218487 is 78481228.

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

It is a cyclic number.

It is not a de Polignac number, because 82218487 - 2⁷ = 82218359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82218427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24378 + ... + 27544.

It is an arithmetic number, because the mean of its divisors is an integer number (11076912).

Almost surely, 2^82218487 is an apocalyptic number.

82218487 is a deficient number, since it is larger than the sum of its proper divisors (6396809).

82218487 is a wasteful number, since it uses less digits than its factorization.

82218487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5177.

The product of its digits is 57344, while the sum is 40.

The square root of 82218487 is about 9067.4410392348. The cubic root of 82218487 is about 434.8336652113.

The spelling of 82218487 in words is "eighty-two million, two hundred eighteen thousand, four hundred eighty-seven".