Base | Representation |
---|---|
bin | 101011111011… |
… | …0110110110111 |
3 | 1121100002220021 |
4 | 1113312312313 |
5 | 21343444343 |
6 | 2141350011 |
7 | 366522265 |
oct | 127666667 |
9 | 47302807 |
10 | 23031223 |
11 | 12000776 |
12 | 7868307 |
13 | 4a05057 |
14 | 30b7435 |
15 | 204e0ed |
hex | 15f6db7 |
23031223 has 4 divisors (see below), whose sum is σ = 23066728. Its totient is φ = 22995720.
The previous prime is 23031167. The next prime is 23031227. The reversal of 23031223 is 32213032.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-23031223 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 23031197 and 23031206.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (23031227) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16761 + ... + 18082.
It is an arithmetic number, because the mean of its divisors is an integer number (5766682).
Almost surely, 223031223 is an apocalyptic number.
23031223 is a deficient number, since it is larger than the sum of its proper divisors (35505).
23031223 is an equidigital number, since it uses as much as digits as its factorization.
23031223 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 35504.
The product of its (nonzero) digits is 216, while the sum is 16.
The square root of 23031223 is about 4799.0856420781. The cubic root of 23031223 is about 284.5153268388.
Adding to 23031223 its reverse (32213032), we get a palindrome (55244255).
The spelling of 23031223 in words is "twenty-three million, thirty-one thousand, two hundred twenty-three".
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