131440434517 has 4 divisors (see below), whose sum is σ = 150217639456. Its totient is φ = 112663229580.

The previous prime is 131440434491. The next prime is 131440434529. The reversal of 131440434517 is 715434044131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131440434517 - 2¹¹ = 131440432469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131440734517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9388602459 + ... + 9388602472.

It is an arithmetic number, because the mean of its divisors is an integer number (37554409864).

Almost surely, 2^131440434517 is an apocalyptic number.

It is an amenable number.

131440434517 is a deficient number, since it is larger than the sum of its proper divisors (18777204939).

131440434517 is an equidigital number, since it uses as much as digits as its factorization.

131440434517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18777204938.

The product of its (nonzero) digits is 80640, while the sum is 37.

Adding to 131440434517 its reverse (715434044131), we get a palindrome (846874478648).

The spelling of 131440434517 in words is "one hundred thirty-one billion, four hundred forty million, four hundred thirty-four thousand, five hundred seventeen".