8220871855 has 12 divisors (see below), whose sum is σ = 11475666360. Its totient is φ = 5637169104.

The previous prime is 8220871843. The next prime is 8220871861. The reversal of 8220871855 is 5581780228.

It is not a de Polignac number, because 8220871855 - 2⁵ = 8220871823 is a prime.

It is a super-2 number, since 2×8220871855² (a number of 21 digits) 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 11 ways as a sum of consecutive naturals, for example, 16777045 + ... + 16777534.

It is an arithmetic number, because the mean of its divisors is an integer number (956305530).

Almost surely, 2^8220871855 is an apocalyptic number.

8220871855 is a deficient number, since it is larger than the sum of its proper divisors (3254794505).

8220871855 is a wasteful number, since it uses less digits than its factorization.

8220871855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33554598 (or 33554591 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 46.

The square root of 8220871855 is about 90669.0236795346. The cubic root of 8220871855 is about 2018.2391490088.

The spelling of 8220871855 in words is "eight billion, two hundred twenty million, eight hundred seventy-one thousand, eight hundred fifty-five".