Base | Representation |
---|---|
bin | 100100010111001… |
… | …1001101001010111 |
3 | 10011000212200102000 |
4 | 1020232121221113 |
5 | 4444322420343 |
6 | 321023250343 |
7 | 42143606364 |
oct | 11056315127 |
9 | 3130780360 |
10 | 1220123223 |
11 | 576800700 |
12 | 2a07499b3 |
13 | 165a1ba07 |
14 | b808b46b |
15 | 721b2ed3 |
hex | 48b99a57 |
1220123223 has 48 divisors (see below), whose sum is σ = 2035538400. Its totient is φ = 721353600.
The previous prime is 1220123207. The next prime is 1220123227. The reversal of 1220123223 is 3223210221.
It is not a de Polignac number, because 1220123223 - 24 = 1220123207 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 1220123196 and 1220123205.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1220123227) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129393 + ... + 138501.
It is an arithmetic number, because the mean of its divisors is an integer number (42407050).
Almost surely, 21220123223 is an apocalyptic number.
1220123223 is a deficient number, since it is larger than the sum of its proper divisors (815415177).
1220123223 is a wasteful number, since it uses less digits than its factorization.
1220123223 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 9181 (or 9164 counting only the distinct ones).
The product of its (nonzero) digits is 288, while the sum is 18.
The square root of 1220123223 is about 34930.2622807216. The cubic root of 1220123223 is about 1068.5657036479.
Adding to 1220123223 its reverse (3223210221), we get a palindrome (4443333444).
The spelling of 1220123223 in words is "one billion, two hundred twenty million, one hundred twenty-three thousand, two hundred twenty-three".
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