131165314436 has 24 divisors (see below), whose sum is σ = 247975999320. Its totient is φ = 60346858752.

The previous prime is 131165314421. The next prime is 131165314439. The reversal of 131165314436 is 634413561131.

It can be written as a sum of positive squares in 4 ways, for example, as 2313032836 + 128852281600 = 48094^2 + 358960^2 .

It is a super-2 number, since 2×131165314436² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131165314436.

It is not an unprimeable number, because it can be changed into a prime (131165314439) 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, 3962081 + ... + 3995048.

It is an arithmetic number, because the mean of its divisors is an integer number (10332333305).

Almost surely, 2^131165314436 is an apocalyptic number.

It is an amenable number.

131165314436 is a deficient number, since it is larger than the sum of its proper divisors (116810684884).

131165314436 is a wasteful number, since it uses less digits than its factorization.

131165314436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7957463 (or 7957461 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

Adding to 131165314436 its reverse (634413561131), we get a palindrome (765578875567).

The spelling of 131165314436 in words is "one hundred thirty-one billion, one hundred sixty-five million, three hundred fourteen thousand, four hundred thirty-six".