131331765 has 8 divisors (see below), whose sum is σ = 210130848. Its totient is φ = 70043600.

The previous prime is 131331757. The next prime is 131331769. The reversal of 131331765 is 567133131.

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

It is not a de Polignac number, because 131331765 - 2³ = 131331757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131331769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4377711 + ... + 4377740.

It is an arithmetic number, because the mean of its divisors is an integer number (26266356).

Almost surely, 2^131331765 is an apocalyptic number.

131331765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131331765 is a deficient number, since it is larger than the sum of its proper divisors (78799083).

131331765 is an equidigital number, since it uses as much as digits as its factorization.

131331765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755459.

The product of its digits is 5670, while the sum is 30.

The square root of 131331765 is about 11460.0071989506. The cubic root of 131331765 is about 508.3036874825.

Adding to 131331765 its reverse (567133131), we get a palindrome (698464896).

The spelling of 131331765 in words is "one hundred thirty-one million, three hundred thirty-one thousand, seven hundred sixty-five".