Base | Representation |
---|---|
bin | 1111100001101… |
… | …11100100010111 |
3 | 100002002102211021 |
4 | 13300313210113 |
5 | 231321013111 |
6 | 20531422011 |
7 | 3141054421 |
oct | 760674427 |
9 | 302072737 |
10 | 130251031 |
11 | 67583589 |
12 | 37754907 |
13 | 20ca5b21 |
14 | 13427811 |
15 | b67cd71 |
hex | 7c37917 |
130251031 has 2 divisors, whose sum is σ = 130251032. Its totient is φ = 130251030.
The previous prime is 130250983. The next prime is 130251067. The reversal of 130251031 is 130152031.
It is a strong prime.
It is an emirp because it is prime and its reverse (130152031) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 130251031 - 27 = 130250903 is a prime.
It is a super-2 number, since 2×1302510312 = 33930662153125922, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 130250996 and 130251014.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (130251131) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65125515 + 65125516.
It is an arithmetic number, because the mean of its divisors is an integer number (65125516).
Almost surely, 2130251031 is an apocalyptic number.
130251031 is a deficient number, since it is larger than the sum of its proper divisors (1).
130251031 is an equidigital number, since it uses as much as digits as its factorization.
130251031 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 90, while the sum is 16.
The square root of 130251031 is about 11412.7573793540. The cubic root of 130251031 is about 506.9055620209.
The spelling of 130251031 in words is "one hundred thirty million, two hundred fifty-one thousand, thirty-one".
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