131242814281 has 4 divisors (see below), whose sum is σ = 131304230932. Its totient is φ = 131181397632.

The previous prime is 131242814221. The next prime is 131242814359. The reversal of 131242814281 is 182418242131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182418242131 = 6907 ⋅26410633.

It can be written as a sum of positive squares in 2 ways, for example, as 33748996681 + 97493817600 = 183709^2 + 312240^2 .

It is a cyclic number.

It is not a de Polignac number, because 131242814281 - 2²¹ = 131240717129 is a prime.

It is a super-2 number, since 2×131242814281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131242814281.

It is not an unprimeable number, because it can be changed into a prime (131242814221) 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, 30705120 + ... + 30709393.

It is an arithmetic number, because the mean of its divisors is an integer number (32826057733).

Almost surely, 2^131242814281 is an apocalyptic number.

It is an amenable number.

131242814281 is a deficient number, since it is larger than the sum of its proper divisors (61416651).

131242814281 is an equidigital number, since it uses as much as digits as its factorization.

131242814281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61416650.

The product of its digits is 24576, while the sum is 37.

The spelling of 131242814281 in words is "one hundred thirty-one billion, two hundred forty-two million, eight hundred fourteen thousand, two hundred eighty-one".