165247165 has 8 divisors (see below), whose sum is σ = 198403128. Its totient is φ = 132126720.

The previous prime is 165247129. The next prime is 165247169. The reversal of 165247165 is 561742561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14915044 + 150332121 = 3862^2 + 12261^2 .

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

It is not a de Polignac number, because 165247165 - 2⁷ = 165247037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165247169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2745 + ... + 18385.

It is an arithmetic number, because the mean of its divisors is an integer number (24800391).

Almost surely, 2^165247165 is an apocalyptic number.

It is an amenable number.

165247165 is a deficient number, since it is larger than the sum of its proper divisors (33155963).

165247165 is a wasteful number, since it uses less digits than its factorization.

165247165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17759.

The product of its digits is 50400, while the sum is 37.

The square root of 165247165 is about 12854.8498629895. The cubic root of 165247165 is about 548.7543877414.

The spelling of 165247165 in words is "one hundred sixty-five million, two hundred forty-seven thousand, one hundred sixty-five".