131344427 has 4 divisors (see below), whose sum is σ = 135581376. Its totient is φ = 127107480.

The previous prime is 131344417. The next prime is 131344453. The reversal of 131344427 is 724443131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724443131 = 997 ⋅726623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131344427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131344427.

It is not an unprimeable number, because it can be changed into a prime (131344417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118428 + ... + 2118489.

It is an arithmetic number, because the mean of its divisors is an integer number (33895344).

Almost surely, 2^131344427 is an apocalyptic number.

131344427 is a deficient number, since it is larger than the sum of its proper divisors (4236949).

131344427 is an equidigital number, since it uses as much as digits as its factorization.

131344427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236948.

The product of its digits is 8064, while the sum is 29.

The square root of 131344427 is about 11460.5596285696. The cubic root of 131344427 is about 508.3200225366.

Adding to 131344427 its reverse (724443131), we get a palindrome (855787558).

The spelling of 131344427 in words is "one hundred thirty-one million, three hundred forty-four thousand, four hundred twenty-seven".