131518531943 has 12 divisors (see below), whose sum is σ = 144839881008. Its totient is φ = 119179257120.

The previous prime is 131518531913. The next prime is 131518531951. The reversal of 131518531943 is 349135815131.

It is a de Polignac number, because none of the positive numbers 2^k-131518531943 is a prime.

It is a super-2 number, since 2×131518531943² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131518531894 and 131518531903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131518531913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7911638 + ... + 7928243.

It is an arithmetic number, because the mean of its divisors is an integer number (12069990084).

Almost surely, 2^131518531943 is an apocalyptic number.

131518531943 is a deficient number, since it is larger than the sum of its proper divisors (13321349065).

131518531943 is a wasteful number, since it uses less digits than its factorization.

131518531943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15839942 (or 15839923 counting only the distinct ones).

The product of its digits is 194400, while the sum is 44.

The spelling of 131518531943 in words is "one hundred thirty-one billion, five hundred eighteen million, five hundred thirty-one thousand, nine hundred forty-three".