131118565 has 16 divisors (see below), whose sum is σ = 162408960. Its totient is φ = 101545920.

The previous prime is 131118557. The next prime is 131118587. The reversal of 131118565 is 565811131.

It is not a de Polignac number, because 131118565 - 2³ = 131118557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37356 + ... + 40714.

It is an arithmetic number, because the mean of its divisors is an integer number (10150560).

Almost surely, 2^131118565 is an apocalyptic number.

It is an amenable number.

131118565 is a deficient number, since it is larger than the sum of its proper divisors (31290395).

131118565 is a wasteful number, since it uses less digits than its factorization.

131118565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612.

The product of its digits is 3600, while the sum is 31.

The square root of 131118565 is about 11450.7015068947. The cubic root of 131118565 is about 508.0284835849.

Adding to 131118565 its reverse (565811131), we get a palindrome (696929696).

The spelling of 131118565 in words is "one hundred thirty-one million, one hundred eighteen thousand, five hundred sixty-five".