131443 has 4 divisors (see below), whose sum is σ = 141568. Its totient is φ = 121320.

The previous prime is 131441. The next prime is 131447. The reversal of 131443 is 344131.

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

It is a cyclic number.

It is not a de Polignac number, because 131443 - 2¹ = 131441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131441) by changing a digit.

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, 5043 + ... + 5068.

It is an arithmetic number, because the mean of its divisors is an integer number (35392).

2¹³¹⁴⁴³ is an apocalyptic number.

131443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131443 is a deficient number, since it is larger than the sum of its proper divisors (10125).

131443 is a wasteful number, since it uses less digits than its factorization.

131443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10124.

The product of its digits is 144, while the sum is 16.

The square root of 131443 is about 362.5506861116. The cubic root of 131443 is about 50.8447154183.

Adding to 131443 its reverse (344131), we get a palindrome (475574).

The spelling of 131443 in words is "one hundred thirty-one thousand, four hundred forty-three".