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23160005 = 511238281
BaseRepresentation
bin101100001011…
…0010011000101
31121120122112222
41120112103011
521412110010
62144222125
7400566611
oct130262305
947518488
1023160005
1112089500
12790a945
134a4b85b
14310c341
152077355
hex16164c5

23160005 has 12 divisors (see below), whose sum is σ = 30549036. Its totient is φ = 16843200.

The previous prime is 23159999. The next prime is 23160017. The reversal of 23160005 is 50006132.

It can be written as a sum of positive squares in 2 ways, for example, as 16924996 + 6235009 = 4114^2 + 2497^2 .

It is not a de Polignac number, because 23160005 - 28 = 23159749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18536 + ... + 19745.

It is an arithmetic number, because the mean of its divisors is an integer number (2545753).

Almost surely, 223160005 is an apocalyptic number.

It is an amenable number.

23160005 is a deficient number, since it is larger than the sum of its proper divisors (7389031).

23160005 is a wasteful number, since it uses less digits than its factorization.

23160005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38308 (or 38297 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 23160005 is about 4812.4842856886. The cubic root of 23160005 is about 285.0446426426.

Adding to 23160005 its reverse (50006132), we get a palindrome (73166137).

The spelling of 23160005 in words is "twenty-three million, one hundred sixty thousand, five".

Divisors: 1 5 11 55 121 605 38281 191405 421091 2105455 4632001 23160005