131677243021481 has 4 divisors (see below), whose sum is σ = 133835886349764. Its totient is φ = 129518599693200.

The previous prime is 131677243021417. The next prime is 131677243021589. The reversal of 131677243021481 is 184120342776131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28249054920256 + 103428188101225 = 5314984^2 + 10169965^2 .

It is a cyclic number.

It is not a de Polignac number, because 131677243021481 - 2⁶ = 131677243021417 is a prime.

It is a super-2 number, since 2×131677243021481² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131677243021781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079321664050 + ... + 1079321664171.

It is an arithmetic number, because the mean of its divisors is an integer number (33458971587441).

Almost surely, 2^{131677243021481} is an apocalyptic number.

It is an amenable number.

131677243021481 is a deficient number, since it is larger than the sum of its proper divisors (2158643328283).

131677243021481 is an equidigital number, since it uses as much as digits as its factorization.

131677243021481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158643328282.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 131677243021481 in words is "one hundred thirty-one trillion, six hundred seventy-seven billion, two hundred forty-three million, twenty-one thousand, four hundred eighty-one".