82218855 has 16 divisors (see below), whose sum is σ = 133217280. Its totient is φ = 43294368.

The previous prime is 82218841. The next prime is 82218869. The reversal of 82218855 is 55881228.

It is an interprime number because it is at equal distance from previous prime (82218841) and next prime (82218869).

It is not a de Polignac number, because 82218855 - 2⁶ = 82218791 is a prime.

It is a super-2 number, since 2×82218855² = 13519880235022050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33507 + ... + 35876.

It is an arithmetic number, because the mean of its divisors is an integer number (8326080).

Almost surely, 2^82218855 is an apocalyptic number.

82218855 is a deficient number, since it is larger than the sum of its proper divisors (50998425).

82218855 is a wasteful number, since it uses less digits than its factorization.

82218855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69470.

The product of its digits is 51200, while the sum is 39.

The square root of 82218855 is about 9067.4613315966. The cubic root of 82218855 is about 434.8343139646.

The spelling of 82218855 in words is "eighty-two million, two hundred eighteen thousand, eight hundred fifty-five".