131335565 has 8 divisors (see below), whose sum is σ = 157701600. Its totient is φ = 105002512.

The previous prime is 131335559. The next prime is 131335571. The reversal of 131335565 is 565533131.

It is an interprime number because it is at equal distance from previous prime (131335559) and next prime (131335571).

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

It is a cyclic number.

It is not a de Polignac number, because 131335565 - 2¹⁸ = 131073421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586 + ... + 16284.

It is an arithmetic number, because the mean of its divisors is an integer number (19712700).

Almost surely, 2^131335565 is an apocalyptic number.

It is an amenable number.

131335565 is a deficient number, since it is larger than the sum of its proper divisors (26366035).

131335565 is a wasteful number, since it uses less digits than its factorization.

131335565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16491.

The product of its digits is 20250, while the sum is 32.

The square root of 131335565 is about 11460.1729917135. The cubic root of 131335565 is about 508.3085899151.

Adding to 131335565 its reverse (565533131), we get a palindrome (696868696).

The spelling of 131335565 in words is "one hundred thirty-one million, three hundred thirty-five thousand, five hundred sixty-five".