131297545781 has 8 divisors (see below), whose sum is σ = 137111474304. Its totient is φ = 125492395600.

The previous prime is 131297545777. The next prime is 131297545789. The reversal of 131297545781 is 187545792131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131297545781 - 2² = 131297545777 is a prime.

It is a super-3 number, since 3×131297545781³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131297545789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2164001 + ... + 2223846.

It is an arithmetic number, because the mean of its divisors is an integer number (17138934288).

Almost surely, 2^131297545781 is an apocalyptic number.

It is an amenable number.

131297545781 is a deficient number, since it is larger than the sum of its proper divisors (5813928523).

131297545781 is a wasteful number, since it uses less digits than its factorization.

131297545781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4389171.

The product of its digits is 2116800, while the sum is 53.

The spelling of 131297545781 in words is "one hundred thirty-one billion, two hundred ninety-seven million, five hundred forty-five thousand, seven hundred eighty-one".