131565765 has 8 divisors (see below), whose sum is σ = 210505248. Its totient is φ = 70168400.

The previous prime is 131565743. The next prime is 131565793. The reversal of 131565765 is 567565131.

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

It is not a de Polignac number, because 131565765 - 2¹⁸ = 131303621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4385511 + ... + 4385540.

It is an arithmetic number, because the mean of its divisors is an integer number (26313156).

Almost surely, 2^131565765 is an apocalyptic number.

131565765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131565765 is a deficient number, since it is larger than the sum of its proper divisors (78939483).

131565765 is an equidigital number, since it uses as much as digits as its factorization.

131565765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8771059.

The product of its digits is 94500, while the sum is 39.

The square root of 131565765 is about 11470.2120730177. The cubic root of 131565765 is about 508.6053979142.

The spelling of 131565765 in words is "one hundred thirty-one million, five hundred sixty-five thousand, seven hundred sixty-five".