131491248587 has 4 divisors (see below), whose sum is σ = 131794923960. Its totient is φ = 131187573216.

The previous prime is 131491248571. The next prime is 131491248601. The reversal of 131491248587 is 785842194131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131491248587 - 2⁴ = 131491248571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131491248517) 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, 151837037 + ... + 151837902.

It is an arithmetic number, because the mean of its divisors is an integer number (32948730990).

Almost surely, 2^131491248587 is an apocalyptic number.

131491248587 is a deficient number, since it is larger than the sum of its proper divisors (303675373).

131491248587 is an equidigital number, since it uses as much as digits as its factorization.

131491248587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303675372.

The product of its digits is 1935360, while the sum is 53.

The spelling of 131491248587 in words is "one hundred thirty-one billion, four hundred ninety-one million, two hundred forty-eight thousand, five hundred eighty-seven".