131530543665 has 8 divisors (see below), whose sum is σ = 210448869888. Its totient is φ = 70149623280.

The previous prime is 131530543649. The next prime is 131530543687. The reversal of 131530543665 is 566345035131.

It is a happy number.

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

It is not a de Polignac number, because 131530543665 - 2⁴ = 131530543649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4384351441 + ... + 4384351470.

It is an arithmetic number, because the mean of its divisors is an integer number (26306108736).

Almost surely, 2^131530543665 is an apocalyptic number.

131530543665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131530543665 is a deficient number, since it is larger than the sum of its proper divisors (78918326223).

131530543665 is an equidigital number, since it uses as much as digits as its factorization.

131530543665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8768702919.

The product of its (nonzero) digits is 486000, while the sum is 42.

Adding to 131530543665 its reverse (566345035131), we get a palindrome (697875578796).

The spelling of 131530543665 in words is "one hundred thirty-one billion, five hundred thirty million, five hundred forty-three thousand, six hundred sixty-five".