131169565 has 16 divisors (see below), whose sum is σ = 161510976. Its totient is φ = 102211200.

The previous prime is 131169557. The next prime is 131169593. The reversal of 131169565 is 565961131.

It is not a de Polignac number, because 131169565 - 2³ = 131169557 is a prime.

It is a Duffinian number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 111430 + ... + 112600.

It is an arithmetic number, because the mean of its divisors is an integer number (10094436).

Almost surely, 2^131169565 is an apocalyptic number.

It is an amenable number.

131169565 is a deficient number, since it is larger than the sum of its proper divisors (30341411).

131169565 is a wasteful number, since it uses less digits than its factorization.

131169565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740.

The product of its digits is 24300, while the sum is 37.

The square root of 131169565 is about 11452.9282281869. The cubic root of 131169565 is about 508.0943427918.

It can be divided in two parts, 1311 and 69565, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 131169565 in words is "one hundred thirty-one million, one hundred sixty-nine thousand, five hundred sixty-five".