Base | Representation |
---|---|
bin | 101000101001… |
… | …1011011101000 |
3 | 1111002211021212 |
4 | 1101103123220 |
5 | 20424011011 |
6 | 2040452252 |
7 | 346105526 |
oct | 121233350 |
9 | 44084255 |
10 | 21313256 |
11 | 11037a68 |
12 | 717a088 |
13 | 45530c3 |
14 | 2b8b316 |
15 | 1d1008b |
hex | 14536e8 |
21313256 has 16 divisors (see below), whose sum is σ = 40012800. Its totient is φ = 10643184.
The previous prime is 21313247. The next prime is 21313283. The reversal of 21313256 is 65231312.
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, 9191 + ... + 11273.
It is an arithmetic number, because the mean of its divisors is an integer number (2500800).
Almost surely, 221313256 is an apocalyptic number.
It is an amenable number.
21313256 is a deficient number, since it is larger than the sum of its proper divisors (18699544).
21313256 is a wasteful number, since it uses less digits than its factorization.
21313256 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3368 (or 3364 counting only the distinct ones).
The product of its digits is 1080, while the sum is 23.
The square root of 21313256 is about 4616.6282068193. The cubic root of 21313256 is about 277.2574771478.
Adding to 21313256 its reverse (65231312), we get a palindrome (86544568).
The spelling of 21313256 in words is "twenty-one million, three hundred thirteen thousand, two hundred fifty-six".
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