131485591 has 2 divisors, whose sum is σ = 131485592. Its totient is φ = 131485590.

The previous prime is 131485589. The next prime is 131485603. The reversal of 131485591 is 195584131.

It is a weak prime.

It is an emirp because it is prime and its reverse (195584131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131485591 - 2¹ = 131485589 is a prime.

Together with 131485589, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131485591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131485511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65742795 + 65742796.

It is an arithmetic number, because the mean of its divisors is an integer number (65742796).

Almost surely, 2^131485591 is an apocalyptic number.

131485591 is a deficient number, since it is larger than the sum of its proper divisors (1).

131485591 is an equidigital number, since it uses as much as digits as its factorization.

131485591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 37.

The square root of 131485591 is about 11466.7166617127. The cubic root of 131485591 is about 508.5020650173.

The spelling of 131485591 in words is "one hundred thirty-one million, four hundred eighty-five thousand, five hundred ninety-one".