810819222113 has 2 divisors, whose sum is σ = 810819222114. Its totient is φ = 810819222112.

The previous prime is 810819222107. The next prime is 810819222121. The reversal of 810819222113 is 311222918018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 762429341584 + 48389880529 = 873172^2 + 219977^2 .

It is a cyclic number.

It is not a de Polignac number, because 810819222113 - 2¹⁶ = 810819156577 is a prime.

It is not a weakly prime, because it can be changed into another prime (810819222133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405409611056 + 405409611057.

It is an arithmetic number, because the mean of its divisors is an integer number (405409611057).

Almost surely, 2^810819222113 is an apocalyptic number.

It is an amenable number.

810819222113 is a deficient number, since it is larger than the sum of its proper divisors (1).

810819222113 is an equidigital number, since it uses as much as digits as its factorization.

810819222113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 38.

The spelling of 810819222113 in words is "eight hundred ten billion, eight hundred nineteen million, two hundred twenty-two thousand, one hundred thirteen".