131315447 has 2 divisors, whose sum is σ = 131315448. Its totient is φ = 131315446.

The previous prime is 131315417. The next prime is 131315449. The reversal of 131315447 is 744513131.

It is a strong prime.

It is an emirp because it is prime and its reverse (744513131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131315447 - 2¹⁰ = 131314423 is a prime.

Together with 131315449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131315449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65657723 + 65657724.

It is an arithmetic number, because the mean of its divisors is an integer number (65657724).

Almost surely, 2^131315447 is an apocalyptic number.

131315447 is a deficient number, since it is larger than the sum of its proper divisors (1).

131315447 is an equidigital number, since it uses as much as digits as its factorization.

131315447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 131315447 is about 11459.2952226566. The cubic root of 131315447 is about 508.2826343297.

Adding to 131315447 its reverse (744513131), we get a palindrome (875828578).

The spelling of 131315447 in words is "one hundred thirty-one million, three hundred fifteen thousand, four hundred forty-seven".