131534565 has 16 divisors (see below), whose sum is σ = 212424768. Its totient is φ = 69495296.

The previous prime is 131534563. The next prime is 131534567. The reversal of 131534565 is 565435131.

It is an interprime number because it is at equal distance from previous prime (131534563) and next prime (131534567).

It is a cyclic number.

It is not a de Polignac number, because 131534565 - 2¹ = 131534563 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131534561) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 39372 + ... + 42581.

It is an arithmetic number, because the mean of its divisors is an integer number (13276548).

Almost surely, 2^131534565 is an apocalyptic number.

131534565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131534565 is a deficient number, since it is larger than the sum of its proper divisors (80890203).

131534565 is a wasteful number, since it uses less digits than its factorization.

131534565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82068.

The product of its digits is 27000, while the sum is 33.

The square root of 131534565 is about 11468.8519477758. The cubic root of 131534565 is about 508.5651905372.

Adding to 131534565 its reverse (565435131), we get a palindrome (696969696).

The spelling of 131534565 in words is "one hundred thirty-one million, five hundred thirty-four thousand, five hundred sixty-five".