131444013 has 4 divisors (see below), whose sum is σ = 175258688. Its totient is φ = 87629340.

The previous prime is 131444009. The next prime is 131444023. The reversal of 131444013 is 310444131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131444013 - 2² = 131444009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131444003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21907333 + ... + 21907338.

It is an arithmetic number, because the mean of its divisors is an integer number (43814672).

Almost surely, 2^131444013 is an apocalyptic number.

It is an amenable number.

131444013 is a deficient number, since it is larger than the sum of its proper divisors (43814675).

131444013 is an equidigital number, since it uses as much as digits as its factorization.

131444013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43814674.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 131444013 is about 11464.9035320843. The cubic root of 131444013 is about 508.4484603406.

Adding to 131444013 its reverse (310444131), we get a palindrome (441888144).

The spelling of 131444013 in words is "one hundred thirty-one million, four hundred forty-four thousand, thirteen".