8221307855105 has 4 divisors (see below), whose sum is σ = 9865569426132. Its totient is φ = 6577046284080.

The previous prime is 8221307855083. The next prime is 8221307855141. The reversal of 8221307855105 is 5015587031228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2243512682896 + 5977795172209 = 1497836^2 + 2444953^2 .

It is not a de Polignac number, because 8221307855105 - 2¹⁸ = 8221307592961 is a prime.

It is a super-2 number, since 2×8221307855105² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8221307855105.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 822130785506 + ... + 822130785515.

It is an arithmetic number, because the mean of its divisors is an integer number (2466392356533).

Almost surely, 2^{8221307855105} is an apocalyptic number.

It is an amenable number.

8221307855105 is a deficient number, since it is larger than the sum of its proper divisors (1644261571027).

8221307855105 is a wasteful number, since it uses less digits than its factorization.

8221307855105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644261571026.

The product of its (nonzero) digits is 672000, while the sum is 47.

The spelling of 8221307855105 in words is "eight trillion, two hundred twenty-one billion, three hundred seven million, eight hundred fifty-five thousand, one hundred five".