131444421 has 8 divisors (see below), whose sum is σ = 179335200. Its totient is φ = 85591632.

The previous prime is 131444407. The next prime is 131444441. The reversal of 131444421 is 124444131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131444421 - 2¹⁰ = 131443397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131444391 and 131444400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131444441) 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 7 ways as a sum of consecutive naturals, for example, 509346 + ... + 509603.

It is an arithmetic number, because the mean of its divisors is an integer number (22416900).

Almost surely, 2^131444421 is an apocalyptic number.

It is an amenable number.

131444421 is a deficient number, since it is larger than the sum of its proper divisors (47890779).

131444421 is a wasteful number, since it uses less digits than its factorization.

131444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018995.

The product of its digits is 1536, while the sum is 24.

The square root of 131444421 is about 11464.9213255042. The cubic root of 131444421 is about 508.4489864118.

Adding to 131444421 its reverse (124444131), we get a palindrome (255888552).

The spelling of 131444421 in words is "one hundred thirty-one million, four hundred forty-four thousand, four hundred twenty-one".