131198543 has 4 divisors (see below), whose sum is σ = 149941200. Its totient is φ = 112455888.

The previous prime is 131198531. The next prime is 131198569. The reversal of 131198543 is 345891131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345891131 = 829 ⋅417239.

It is a cyclic number.

It is not a de Polignac number, because 131198543 - 2⁴ = 131198527 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 (131198143) 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, 9371318 + ... + 9371331.

It is an arithmetic number, because the mean of its divisors is an integer number (37485300).

Almost surely, 2^131198543 is an apocalyptic number.

131198543 is a deficient number, since it is larger than the sum of its proper divisors (18742657).

131198543 is an equidigital number, since it uses as much as digits as its factorization.

131198543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18742656.

The product of its digits is 12960, while the sum is 35.

The square root of 131198543 is about 11454.1932496357. The cubic root of 131198543 is about 508.1317561297.

The spelling of 131198543 in words is "one hundred thirty-one million, one hundred ninety-eight thousand, five hundred forty-three".