Base | Representation |
---|---|
bin | 1001111011000… |
… | …00000000000001 |
3 | 12210121120002022 |
4 | 10331200000001 |
5 | 132301340341 |
6 | 12131531225 |
7 | 2030310110 |
oct | 475400001 |
9 | 183546068 |
10 | 83230721 |
11 | 42a88522 |
12 | 23a59b15 |
13 | 14321a62 |
14 | b0a7c77 |
15 | 7490e4b |
hex | 4f60001 |
83230721 has 12 divisors (see below), whose sum is σ = 99394752. Its totient is φ = 68143944.
The previous prime is 83230717. The next prime is 83230739. The reversal of 83230721 is 12703238.
It is not a de Polignac number, because 83230721 - 22 = 83230717 is a prime.
It is an alternating number because its digits alternate between even and odd.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (83230711) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115400 + ... + 116118.
It is an arithmetic number, because the mean of its divisors is an integer number (8282896).
It is a Proth number, since it is equal to 635 ⋅ 217 + 1 and 635 < 217.
Almost surely, 283230721 is an apocalyptic number.
It is an amenable number.
83230721 is a deficient number, since it is larger than the sum of its proper divisors (16164031).
83230721 is an frugal number, since it uses more digits than its factorization.
83230721 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1468 (or 749 counting only the distinct ones).
The product of its (nonzero) digits is 2016, while the sum is 26.
The square root of 83230721 is about 9123.0872515832. The cubic root of 83230721 is about 436.6108784726.
Adding to 83230721 its reverse (12703238), we get a palindrome (95933959).
The spelling of 83230721 in words is "eighty-three million, two hundred thirty thousand, seven hundred twenty-one".
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