131855 has 4 divisors (see below), whose sum is σ = 158232. Its totient is φ = 105480.

The previous prime is 131849. The next prime is 131861. The reversal of 131855 is 558131.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (131849) and next prime (131861).

It is not a de Polignac number, because 131855 - 2⁴ = 131839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13181 + ... + 13190.

It is an arithmetic number, because the mean of its divisors is an integer number (39558).

2¹³¹⁸⁵⁵ is an apocalyptic number.

131855 is a deficient number, since it is larger than the sum of its proper divisors (26377).

131855 is an equidigital number, since it uses as much as digits as its factorization.

131855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26376.

The product of its digits is 600, while the sum is 23.

The square root of 131855 is about 363.1184379786. The cubic root of 131855 is about 50.8977832222.

Adding to 131855 its reverse (558131), we get a palindrome (689986).

The spelling of 131855 in words is "one hundred thirty-one thousand, eight hundred fifty-five".