165501 has 24 divisors (see below), whose sum is σ = 284544. Its totient is φ = 90720.

The previous prime is 165479. The next prime is 165511. The reversal of 165501 is 105561.

165501 is a `hidden beast` number, since 165 + 501 = 666.

165501 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165501 - 2⁵ = 165469 is a prime.

165501 is strictly pandigital in base 7.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2296 + ... + 2366.

It is an arithmetic number, because the mean of its divisors is an integer number (11856).

2¹⁶⁵⁵⁰¹ is an apocalyptic number.

It is an amenable number.

165501 is a deficient number, since it is larger than the sum of its proper divisors (119043).

165501 is a wasteful number, since it uses less digits than its factorization.

165501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 165501 is about 406.8181411884. The cubic root of 165501 is about 54.9035223237.

It can be divided in two parts, 165 and 501, that added together give a palindrome (666).

The spelling of 165501 in words is "one hundred sixty-five thousand, five hundred one".