Base | Representation |
---|---|
bin | 1111001001001011… |
… | …00101011100001111 |
3 | 202222121002001222121 |
4 | 13210211211130033 |
5 | 113122241301411 |
6 | 3422422353411 |
7 | 405320034316 |
oct | 74445453417 |
9 | 22877061877 |
10 | 8130025231 |
11 | 34a2207319 |
12 | 16aa88b867 |
13 | 9c746a223 |
14 | 571a7327d |
15 | 328b31571 |
hex | 1e496570f |
8130025231 has 2 divisors, whose sum is σ = 8130025232. Its totient is φ = 8130025230.
The previous prime is 8130025229. The next prime is 8130025237. The reversal of 8130025231 is 1325200318.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 8130025231 - 21 = 8130025229 is a prime.
It is a super-2 number, since 2×81300252312 (a number of 21 digits) contains 22 as substring.
Together with 8130025229, it forms a pair of twin primes.
It is a junction number, because it is equal to n+sod(n) for n = 8130025196 and 8130025205.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (8130025237) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4065012615 + 4065012616.
It is an arithmetic number, because the mean of its divisors is an integer number (4065012616).
Almost surely, 28130025231 is an apocalyptic number.
8130025231 is a deficient number, since it is larger than the sum of its proper divisors (1).
8130025231 is an equidigital number, since it uses as much as digits as its factorization.
8130025231 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1440, while the sum is 25.
The square root of 8130025231 is about 90166.6525440531. The cubic root of 8130025231 is about 2010.7772569686. Note that the first 3 decimals are identical.
Adding to 8130025231 its reverse (1325200318), we get a palindrome (9455225549).
The spelling of 8130025231 in words is "eight billion, one hundred thirty million, twenty-five thousand, two hundred thirty-one".
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