812222105 has 8 divisors (see below), whose sum is σ = 975271752. Its totient is φ = 649374208.

The previous prime is 812222083. The next prime is 812222119. The reversal of 812222105 is 501222218.

It can be written as a sum of positive squares in 4 ways, for example, as 84787264 + 727434841 = 9208^2 + 26971^2 .

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 812222105 - 2¹² = 812218009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41432 + ... + 57801.

It is an arithmetic number, because the mean of its divisors is an integer number (121908969).

Almost surely, 2^812222105 is an apocalyptic number.

It is an amenable number.

812222105 is a deficient number, since it is larger than the sum of its proper divisors (163049647).

812222105 is a wasteful number, since it uses less digits than its factorization.

812222105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100875.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 812222105 is about 28499.5106098333. The cubic root of 812222105 is about 933.0213928489.

The spelling of 812222105 in words is "eight hundred twelve million, two hundred twenty-two thousand, one hundred five".