131131447 has 2 divisors, whose sum is σ = 131131448. Its totient is φ = 131131446.

The previous prime is 131131439. The next prime is 131131471. The reversal of 131131447 is 744131131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131131447 - 2³ = 131131439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131131747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65565723 + 65565724.

It is an arithmetic number, because the mean of its divisors is an integer number (65565724).

Almost surely, 2^131131447 is an apocalyptic number.

131131447 is a deficient number, since it is larger than the sum of its proper divisors (1).

131131447 is an equidigital number, since it uses as much as digits as its factorization.

131131447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 131131447 is about 11451.2639913679. The cubic root of 131131447 is about 508.0451204575.

Adding to 131131447 its reverse (744131131), we get a palindrome (875262578).

The spelling of 131131447 in words is "one hundred thirty-one million, one hundred thirty-one thousand, four hundred forty-seven".