818223526131 has 16 divisors (see below), whose sum is σ = 1201926912768. Its totient is φ = 490983212000.

The previous prime is 818223526111. The next prime is 818223526139. The reversal of 818223526131 is 131625322818.

It is a cyclic number.

It is not a de Polignac number, because 818223526131 - 2³³ = 809633591539 is a prime.

It is a super-2 number, since 2×818223526131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (818223526139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122742471 + ... + 122749136.

It is an arithmetic number, because the mean of its divisors is an integer number (75120432048).

Almost surely, 2^818223526131 is an apocalyptic number.

818223526131 is a deficient number, since it is larger than the sum of its proper divisors (383703386637).

818223526131 is a wasteful number, since it uses less digits than its factorization.

818223526131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245491722.

The product of its digits is 138240, while the sum is 42.

Adding to 818223526131 its reverse (131625322818), we get a palindrome (949848848949).

The spelling of 818223526131 in words is "eight hundred eighteen billion, two hundred twenty-three million, five hundred twenty-six thousand, one hundred thirty-one".