Base | Representation |
---|---|
bin | 111101011100111… |
… | …101000001000011 |
3 | 2122212000020022001 |
4 | 331130331001003 |
5 | 4102414001011 |
6 | 250145524431 |
7 | 34356233200 |
oct | 7534750103 |
9 | 2585006261 |
10 | 1031000131 |
11 | 489a77727 |
12 | 249343717 |
13 | 1357a2465 |
14 | 9acdaca7 |
15 | 607a67c1 |
hex | 3d73d043 |
1031000131 has 12 divisors (see below), whose sum is σ = 1224847008. Its totient is φ = 864910032.
The previous prime is 1031000129. The next prime is 1031000167. The reversal of 1031000131 is 1310001301.
It is not a de Polignac number, because 1031000131 - 21 = 1031000129 is a prime.
It is a super-2 number, since 2×10310001312 = 2125922540244034322, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (1031004131) 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, 221536 + ... + 226141.
It is an arithmetic number, because the mean of its divisors is an integer number (102070584).
Almost surely, 21031000131 is an apocalyptic number.
1031000131 is a deficient number, since it is larger than the sum of its proper divisors (193846877).
1031000131 is an equidigital number, since it uses as much as digits as its factorization.
1031000131 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 447738 (or 447731 counting only the distinct ones).
The product of its (nonzero) digits is 9, while the sum is 10.
The square root of 1031000131 is about 32109.1907559191. The cubic root of 1031000131 is about 1010.2284001318.
Adding to 1031000131 its reverse (1310001301), we get a palindrome (2341001432).
The spelling of 1031000131 in words is "one billion, thirty-one million, one hundred thirty-one", and thus it is an aban number.
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