213493223682 has 18 divisors (see below), whose sum is σ = 462572898723. Its totient is φ = 71163754452.

The previous prime is 213493223663. The next prime is 213493223687. The reversal of 213493223682 is 286322394312.

213493223682 is a `hidden beast` number, since 2 + 1 + 349 + 3 + 223 + 6 + 82 = 666.

It can be written as a sum of positive squares in only one way, i.e., 106746611841 + 106746611841 = 326721^2 + 326721^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=326721.

It is not an unprimeable number, because it can be changed into a prime (213493223687) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 1905873 + ... + 2014779.

Almost surely, 2^213493223682 is an apocalyptic number.

213493223682 is an abundant number, since it is smaller than the sum of its proper divisors (249079675041).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213493223682 is an frugal number, since it uses more digits than its factorization.

213493223682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217822 (or 108912 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The spelling of 213493223682 in words is "two hundred thirteen billion, four hundred ninety-three million, two hundred twenty-three thousand, six hundred eighty-two".