131112165 has 16 divisors (see below), whose sum is σ = 209922048. Its totient is φ = 69878976.

The previous prime is 131112139. The next prime is 131112169. The reversal of 131112165 is 561211131.

It is a happy number.

It is not a de Polignac number, because 131112165 - 2¹⁴ = 131095781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131112169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38679 + ... + 41931.

It is an arithmetic number, because the mean of its divisors is an integer number (13120128).

Almost surely, 2^131112165 is an apocalyptic number.

131112165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131112165 is a deficient number, since it is larger than the sum of its proper divisors (78809883).

131112165 is a wasteful number, since it uses less digits than its factorization.

131112165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5948.

The product of its digits is 180, while the sum is 21.

The square root of 131112165 is about 11450.4220446235. The cubic root of 131112165 is about 508.0202176941.

Adding to 131112165 its reverse (561211131), we get a palindrome (692323296).

The spelling of 131112165 in words is "one hundred thirty-one million, one hundred twelve thousand, one hundred sixty-five".