131161522365 has 96 divisors (see below), whose sum is σ = 235939392000. Its totient is φ = 67368278016.

The previous prime is 131161522357. The next prime is 131161522367. The reversal of 131161522365 is 563225161131.

131161522365 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 615 + 2 + 2 + 36 + 5 = 666.

It is not a de Polignac number, because 131161522365 - 2³ = 131161522357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131161522367) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33724341 + ... + 33728229.

It is an arithmetic number, because the mean of its divisors is an integer number (2457702000).

Almost surely, 2^131161522365 is an apocalyptic number.

131161522365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131161522365 is a deficient number, since it is larger than the sum of its proper divisors (104777869635).

131161522365 is a wasteful number, since it uses less digits than its factorization.

131161522365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211 (or 4208 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

Adding to 131161522365 its reverse (563225161131), we get a palindrome (694386683496).

The spelling of 131161522365 in words is "one hundred thirty-one billion, one hundred sixty-one million, five hundred twenty-two thousand, three hundred sixty-five".