813223101842 has 18 divisors (see below), whose sum is σ = 1223020409247. Its totient is φ = 405552396000.

The previous prime is 813223101781. The next prime is 813223101869. The reversal of 813223101842 is 248101322318.

It can be written as a sum of positive squares in 5 ways, for example, as 763650524641 + 49572577201 = 873871^2 + 222649^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=637661.

It is a super-2 number, since 2×813223101842² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 766467992 + ... + 766469052.

Almost surely, 2^813223101842 is an apocalyptic number.

813223101842 is a deficient number, since it is larger than the sum of its proper divisors (409797307405).

813223101842 is an frugal number, since it uses more digits than its factorization.

813223101842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326 (or 1664 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 813223101842 in words is "eight hundred thirteen billion, two hundred twenty-three million, one hundred one thousand, eight hundred forty-two".