813234822217 has 8 divisors (see below), whose sum is σ = 826590233480. Its totient is φ = 799880175360.

The previous prime is 813234822199. The next prime is 813234822229. The reversal of 813234822217 is 712228432318.

It can be written as a sum of positive squares in 4 ways, for example, as 1332907081 + 811901915136 = 36509^2 + 901056^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 813234822217 - 2¹⁹ = 813234297929 is a prime.

It is a super-2 number, since 2×813234822217² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813234822247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2197159 + ... + 2540467.

It is an arithmetic number, because the mean of its divisors is an integer number (103323779185).

Almost surely, 2^813234822217 is an apocalyptic number.

It is an amenable number.

813234822217 is a deficient number, since it is larger than the sum of its proper divisors (13355411263).

813234822217 is a wasteful number, since it uses less digits than its factorization.

813234822217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382203.

The product of its digits is 258048, while the sum is 43.

The spelling of 813234822217 in words is "eight hundred thirteen billion, two hundred thirty-four million, eight hundred twenty-two thousand, two hundred seventeen".