131440241 has 4 divisors (see below), whose sum is σ = 133291584. Its totient is φ = 129588900.

The previous prime is 131440213. The next prime is 131440249. The reversal of 131440241 is 142044131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 142044131 = 41 ⋅3464491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131440241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131440249) 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, 925565 + ... + 925706.

It is an arithmetic number, because the mean of its divisors is an integer number (33322896).

Almost surely, 2^131440241 is an apocalyptic number.

It is an amenable number.

131440241 is a deficient number, since it is larger than the sum of its proper divisors (1851343).

131440241 is an equidigital number, since it uses as much as digits as its factorization.

131440241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851342.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 131440241 is about 11464.7390288659. The cubic root of 131440241 is about 508.4435967085.

Adding to 131440241 its reverse (142044131), we get a palindrome (273484372).

The spelling of 131440241 in words is "one hundred thirty-one million, four hundred forty thousand, two hundred forty-one".