131043243 has 4 divisors (see below), whose sum is σ = 174724328. Its totient is φ = 87362160.

The previous prime is 131043229. The next prime is 131043251. The reversal of 131043243 is 342340131.

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

It is not a de Polignac number, because 131043243 - 2¹² = 131039147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131043203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21840538 + ... + 21840543.

It is an arithmetic number, because the mean of its divisors is an integer number (43681082).

Almost surely, 2^131043243 is an apocalyptic number.

131043243 is a deficient number, since it is larger than the sum of its proper divisors (43681085).

131043243 is an equidigital number, since it uses as much as digits as its factorization.

131043243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43681084.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 131043243 is about 11447.4120656155. The cubic root of 131043243 is about 507.9311847492.

Adding to 131043243 its reverse (342340131), we get a palindrome (473383374).

It can be divided in two parts, 131043 and 243, that multiplied together give a square (31843449 = 5643²).

The spelling of 131043243 in words is "one hundred thirty-one million, forty-three thousand, two hundred forty-three".