131440440457 has 4 divisors (see below), whose sum is σ = 137155242240. Its totient is φ = 125725638676.

The previous prime is 131440440451. The next prime is 131440440463. The reversal of 131440440457 is 754044044131.

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 an interprime number because it is at equal distance from previous prime (131440440451) and next prime (131440440463).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131440440457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131440440451) 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, 2857400857 + ... + 2857400902.

It is an arithmetic number, because the mean of its divisors is an integer number (34288810560).

Almost surely, 2^131440440457 is an apocalyptic number.

It is an amenable number.

131440440457 is a deficient number, since it is larger than the sum of its proper divisors (5714801783).

131440440457 is an equidigital number, since it uses as much as digits as its factorization.

131440440457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5714801782.

The product of its (nonzero) digits is 107520, while the sum is 37.

Adding to 131440440457 its reverse (754044044131), we get a palindrome (885484484588).

The spelling of 131440440457 in words is "one hundred thirty-one billion, four hundred forty million, four hundred forty thousand, four hundred fifty-seven".