131165365 has 8 divisors (see below), whose sum is σ = 157635000. Its totient is φ = 104774592.

The previous prime is 131165357. The next prime is 131165381. The reversal of 131165365 is 563561131.

It can be written as a sum of positive squares in 4 ways, for example, as 51581124 + 79584241 = 7182^2 + 8921^2 .

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 131165365 - 2³ = 131165357 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, 15990 + ... + 22759.

It is an arithmetic number, because the mean of its divisors is an integer number (19704375).

Almost surely, 2^131165365 is an apocalyptic number.

It is an amenable number.

131165365 is a deficient number, since it is larger than the sum of its proper divisors (26469635).

131165365 is an equidigital number, since it uses as much as digits as its factorization.

131165365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39431.

The product of its digits is 8100, while the sum is 31.

The square root of 131165365 is about 11452.7448674979. The cubic root of 131165365 is about 508.0889197376.

It can be divided in two parts, 13116 and 5365, that added together give a palindrome (18481).

The spelling of 131165365 in words is "one hundred thirty-one million, one hundred sixty-five thousand, three hundred sixty-five".