131551214845 has 4 divisors (see below), whose sum is σ = 157861457820. Its totient is φ = 105240971872.

The previous prime is 131551214807. The next prime is 131551214849. The reversal of 131551214845 is 548412155131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548412155131 = 71 ⋅7724114861.

It can be written as a sum of positive squares in 2 ways, for example, as 68760377284 + 62790837561 = 262222^2 + 250581^2 .

It is a cyclic number.

It is not a de Polignac number, because 131551214845 - 2¹¹ = 131551212797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131551214798 and 131551214807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131551214849) 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 3 ways as a sum of consecutive naturals, for example, 13155121480 + ... + 13155121489.

It is an arithmetic number, because the mean of its divisors is an integer number (39465364455).

Almost surely, 2^131551214845 is an apocalyptic number.

It is an amenable number.

131551214845 is a deficient number, since it is larger than the sum of its proper divisors (26310242975).

131551214845 is an equidigital number, since it uses as much as digits as its factorization.

131551214845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26310242974.

The product of its digits is 96000, while the sum is 40.

Adding to 131551214845 its reverse (548412155131), we get a palindrome (679963369976).

The spelling of 131551214845 in words is "one hundred thirty-one billion, five hundred fifty-one million, two hundred fourteen thousand, eight hundred forty-five".