131559 has 4 divisors (see below), whose sum is σ = 175416.
Its totient is φ = 87704.
The previous prime is 131543. The next prime is 131561. The reversal of 131559 is 955131.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955131 = 3 ⋅318377.
It is a cyclic number.
It is not a de Polignac number, because 131559 - 24 = 131543 is a prime.
It is a D-number.
131559 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (131519) 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, 21924 + ... + 21929.
It is an arithmetic number, because the mean of its divisors is an integer number (43854).
2131559 is an apocalyptic number.
131559 is a deficient number, since it is larger than the sum of its proper divisors (43857).
131559 is an equidigital number, since it uses as much as digits as its factorization.
131559 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 43856.
The product of its digits is 675, while the sum is 24.
The square root of 131559 is about 362.7106284630.
The cubic root of 131559 is about 50.8596680412.
The spelling of 131559 in words is "one hundred thirty-one thousand, five hundred fifty-nine".