131510665 has 48 divisors (see below), whose sum is σ = 195197184. Its totient is φ = 84332160.

The previous prime is 131510651. The next prime is 131510669. The reversal of 131510665 is 566015131.

It is not a de Polignac number, because 131510665 - 2⁵ = 131510633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131510669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180532 + ... + 181258.

It is an arithmetic number, because the mean of its divisors is an integer number (4066608).

Almost surely, 2^131510665 is an apocalyptic number.

It is an amenable number.

131510665 is a deficient number, since it is larger than the sum of its proper divisors (63686519).

131510665 is a wasteful number, since it uses less digits than its factorization.

131510665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 131510665 is about 11467.8099478497. The cubic root of 131510665 is about 508.5343863545.

Adding to 131510665 its reverse (566015131), we get a palindrome (697525796).

The spelling of 131510665 in words is "one hundred thirty-one million, five hundred ten thousand, six hundred sixty-five".