131041028218 has 12 divisors (see below), whose sum is σ = 207451379610. Its totient is φ = 62072065656.

The previous prime is 131041028213. The next prime is 131041028303. The reversal of 131041028218 is 812820140131.

It can be written as a sum of positive squares in only one way, i.e., 122313171289 + 8727856929 = 349733^2 + 93423^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131041028218.

It is not an unprimeable number, because it can be changed into a prime (131041028213) 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 5 ways as a sum of consecutive naturals, for example, 90747913 + ... + 90749356.

Almost surely, 2^131041028218 is an apocalyptic number.

131041028218 is a deficient number, since it is larger than the sum of its proper divisors (76410351392).

131041028218 is a wasteful number, since it uses less digits than its factorization.

131041028218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181497309 (or 181497290 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

Adding to 131041028218 its reverse (812820140131), we get a palindrome (943861168349).

The spelling of 131041028218 in words is "one hundred thirty-one billion, forty-one million, twenty-eight thousand, two hundred eighteen".