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23213165 = 521122003
BaseRepresentation
bin101100010001…
…1010001101101
31121200100110212
41120203101231
521420310130
62145312205
7401210603
oct130432155
947610425
1023213165
1112115438
127935665
134a69b01
143123873
152087e95
hex162346d

23213165 has 8 divisors (see below), whose sum is σ = 27989088. Its totient is φ = 18481680.

The previous prime is 23213161. The next prime is 23213173. The reversal of 23213165 is 56131232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23213165 - 22 = 23213161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23213165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9947 + ... + 12056.

It is an arithmetic number, because the mean of its divisors is an integer number (3498636).

Almost surely, 223213165 is an apocalyptic number.

It is an amenable number.

23213165 is a deficient number, since it is larger than the sum of its proper divisors (4775923).

23213165 is a wasteful number, since it uses less digits than its factorization.

23213165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22219.

The product of its digits is 1080, while the sum is 23.

The square root of 23213165 is about 4818.0042548757. The cubic root of 23213165 is about 285.2625670952.

Adding to 23213165 its reverse (56131232), we get a palindrome (79344397).

The spelling of 23213165 in words is "twenty-three million, two hundred thirteen thousand, one hundred sixty-five".

Divisors: 1 5 211 1055 22003 110015 4642633 23213165