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23061805 = 5131971801
BaseRepresentation
bin101011111111…
…0010100101101
31121101122211221
41113332110231
521400434210
62142143341
7400010404
oct127762455
947348757
1023061805
1112021748
127881b51
134a15c50
1430c463b
1520581da
hex15fe52d

23061805 has 16 divisors (see below), whose sum is σ = 29970864. Its totient is φ = 16934400.

The previous prime is 23061791. The next prime is 23061811. The reversal of 23061805 is 50816032.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 537289 + 22524516 = 733^2 + 4746^2 .

It is not a de Polignac number, because 23061805 - 27 = 23061677 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 23061805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11905 + ... + 13705.

It is an arithmetic number, because the mean of its divisors is an integer number (1873179).

Almost surely, 223061805 is an apocalyptic number.

It is an amenable number.

23061805 is a deficient number, since it is larger than the sum of its proper divisors (6909059).

23061805 is a wasteful number, since it uses less digits than its factorization.

23061805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 23061805 is about 4802.2708170198. The cubic root of 23061805 is about 284.6412023273.

Adding to 23061805 its reverse (50816032), we get a palindrome (73877837).

The spelling of 23061805 in words is "twenty-three million, sixty-one thousand, eight hundred five".

Divisors: 1 5 13 65 197 985 1801 2561 9005 12805 23413 117065 354797 1773985 4612361 23061805