165118247 has 4 divisors (see below), whose sum is σ = 188706576. Its totient is φ = 141529920.

The previous prime is 165118231. The next prime is 165118253. The reversal of 165118247 is 742811561.

165118247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742811561 = 4547 ⋅163363.

It is not a de Polignac number, because 165118247 - 2⁴ = 165118231 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 (165118207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11794154 + ... + 11794167.

It is an arithmetic number, because the mean of its divisors is an integer number (47176644).

Almost surely, 2^165118247 is an apocalyptic number.

165118247 is a deficient number, since it is larger than the sum of its proper divisors (23588329).

165118247 is an equidigital number, since it uses as much as digits as its factorization.

165118247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23588328.

The product of its digits is 13440, while the sum is 35.

The square root of 165118247 is about 12849.8345125531. The cubic root of 165118247 is about 548.6116465668.

The spelling of 165118247 in words is "one hundred sixty-five million, one hundred eighteen thousand, two hundred forty-seven".