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164165 = 532833
BaseRepresentation
bin101000000101000101
322100012012
4220011011
520223130
63304005
71252421
oct500505
9270165
10164165
11102381
127b005
1359951
1443b81
1533995
hex28145

164165 has 4 divisors (see below), whose sum is σ = 197004. Its totient is φ = 131328.

The previous prime is 164149. The next prime is 164173. The reversal of 164165 is 561461.

164165 = 2862 + 2872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82369 + 81796 = 287^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 164165 - 24 = 164149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 164165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16412 + ... + 16421.

It is an arithmetic number, because the mean of its divisors is an integer number (49251).

2164165 is an apocalyptic number.

164165 is the 287-th centered square number.

It is an amenable number.

164165 is a deficient number, since it is larger than the sum of its proper divisors (32839).

164165 is an equidigital number, since it uses as much as digits as its factorization.

164165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32838.

The product of its digits is 720, while the sum is 23.

The square root of 164165 is about 405.1728026410. The cubic root of 164165 is about 54.7553875282.

The spelling of 164165 in words is "one hundred sixty-four thousand, one hundred sixty-five".

Divisors: 1 5 32833 164165