131307184991 has 8 divisors (see below), whose sum is σ = 133085547504. Its totient is φ = 129533497600.

The previous prime is 131307184903. The next prime is 131307185027. The reversal of 131307184991 is 199481703131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131307184991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131307084991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112210 + ... + 1224591.

It is an arithmetic number, because the mean of its divisors is an integer number (16635693438).

Almost surely, 2^131307184991 is an apocalyptic number.

131307184991 is a deficient number, since it is larger than the sum of its proper divisors (1778362513).

131307184991 is an equidigital number, since it uses as much as digits as its factorization.

131307184991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337561.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 131307184991 in words is "one hundred thirty-one billion, three hundred seven million, one hundred eighty-four thousand, nine hundred ninety-one".