131123443 has 4 divisors (see below), whose sum is σ = 143043768. Its totient is φ = 119203120.

The previous prime is 131123441. The next prime is 131123479. The reversal of 131123443 is 344321131.

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 131123443 - 2¹ = 131123441 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131123441) 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, 5960146 + ... + 5960167.

It is an arithmetic number, because the mean of its divisors is an integer number (35760942).

Almost surely, 2^131123443 is an apocalyptic number.

131123443 is a deficient number, since it is larger than the sum of its proper divisors (11920325).

131123443 is a wasteful number, since it uses less digits than its factorization.

131123443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11920324.

The product of its digits is 864, while the sum is 22.

The square root of 131123443 is about 11450.9145049642. The cubic root of 131123443 is about 508.0347835628.

Adding to 131123443 its reverse (344321131), we get a palindrome (475444574).

The spelling of 131123443 in words is "one hundred thirty-one million, one hundred twenty-three thousand, four hundred forty-three".