Base | Representation |
---|---|
bin | 11000001101000… |
… | …00000111110111 |
3 | 112011001001012211 |
4 | 30012200013313 |
5 | 403433443111 |
6 | 32051354251 |
7 | 5013510130 |
oct | 1406400767 |
9 | 464031184 |
10 | 203031031 |
11 | a4673245 |
12 | 57bb2987 |
13 | 330a8b08 |
14 | 1cd70c87 |
15 | 12c57521 |
hex | c1a01f7 |
203031031 has 16 divisors (see below), whose sum is σ = 238097664. Its totient is φ = 169539264.
The previous prime is 203031011. The next prime is 203031067. The reversal of 203031031 is 130130302.
It is a cyclic number.
It is not a de Polignac number, because 203031031 - 25 = 203030999 is a prime.
It is a super-2 number, since 2×2030310312 = 82443199097845922, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (203031011) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40020 + ... + 44806.
It is an arithmetic number, because the mean of its divisors is an integer number (14881104).
Almost surely, 2203031031 is an apocalyptic number.
203031031 is a deficient number, since it is larger than the sum of its proper divisors (35066633).
203031031 is an equidigital number, since it uses as much as digits as its factorization.
203031031 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4950.
The product of its (nonzero) digits is 54, while the sum is 13.
The square root of 203031031 is about 14248.8957817790. The cubic root of 203031031 is about 587.7430107404.
Adding to 203031031 its reverse (130130302), we get a palindrome (333161333).
The spelling of 203031031 in words is "two hundred three million, thirty-one thousand, thirty-one".
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