131512665 has 8 divisors (see below), whose sum is σ = 210420288. Its totient is φ = 70140080.

The previous prime is 131512657. The next prime is 131512679. The reversal of 131512665 is 566215131.

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

It is not a de Polignac number, because 131512665 - 2³ = 131512657 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4383741 + ... + 4383770.

It is an arithmetic number, because the mean of its divisors is an integer number (26302536).

Almost surely, 2^131512665 is an apocalyptic number.

131512665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131512665 is a deficient number, since it is larger than the sum of its proper divisors (78907623).

131512665 is an equidigital number, since it uses as much as digits as its factorization.

131512665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8767519.

The product of its digits is 5400, while the sum is 30.

The square root of 131512665 is about 11467.8971481262. The cubic root of 131512665 is about 508.5369642535.

Adding to 131512665 its reverse (566215131), we get a palindrome (697727796).

The spelling of 131512665 in words is "one hundred thirty-one million, five hundred twelve thousand, six hundred sixty-five".