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165101 = 1071543
BaseRepresentation
bin101000010011101101
322101110212
4220103231
520240401
63312205
71255226
oct502355
9271425
10165101
11103052
127b665
135a1c1
144424d
1533dbb
hex284ed

165101 has 4 divisors (see below), whose sum is σ = 166752. Its totient is φ = 163452.

The previous prime is 165089. The next prime is 165103. The reversal of 165101 is 101561.

165101 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165101 - 26 = 165037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165103) 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, 665 + ... + 878.

It is an arithmetic number, because the mean of its divisors is an integer number (41688).

2165101 is an apocalyptic number.

It is an amenable number.

165101 is a deficient number, since it is larger than the sum of its proper divisors (1651).

165101 is a wasteful number, since it uses less digits than its factorization.

165101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 165101 is about 406.3262236184. The cubic root of 165101 is about 54.8592544631.

Adding to 165101 its reverse (101561), we get a palindrome (266662).

The spelling of 165101 in words is "one hundred sixty-five thousand, one hundred one".

Divisors: 1 107 1543 165101