Base | Representation |
---|---|
bin | 1000101101011110111 |
3 | 112111112112 |
4 | 1011223313 |
5 | 33113211 |
6 | 10041235 |
7 | 2266106 |
oct | 1055367 |
9 | 474475 |
10 | 285431 |
11 | 1854a3 |
12 | 11921b |
13 | 9cbc3 |
14 | 7603d |
15 | 5988b |
hex | 45af7 |
285431 has 4 divisors (see below), whose sum is σ = 291552. Its totient is φ = 279312.
The previous prime is 285421. The next prime is 285433. The reversal of 285431 is 134582.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 285431 - 210 = 284407 is a prime.
It is a super-2 number, since 2×2854312 = 162941711522, which contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 285397 and 285406.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285431.
It is not an unprimeable number, because it can be changed into a prime (285433) 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, 2990 + ... + 3083.
It is an arithmetic number, because the mean of its divisors is an integer number (72888).
2285431 is an apocalyptic number.
285431 is a deficient number, since it is larger than the sum of its proper divisors (6121).
285431 is an equidigital number, since it uses as much as digits as its factorization.
285431 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6120.
The product of its digits is 960, while the sum is 23.
The square root of 285431 is about 534.2574285866. The cubic root of 285431 is about 65.8416005570.
The spelling of 285431 in words is "two hundred eighty-five thousand, four hundred thirty-one".
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