Base | Representation |
---|---|
bin | 1111100000110… |
… | …10010000100101 |
3 | 100001212100010222 |
4 | 13300122100211 |
5 | 231303142411 |
6 | 20525054125 |
7 | 3140044421 |
oct | 760322045 |
9 | 301770128 |
10 | 130130981 |
11 | 67501372 |
12 | 376b7345 |
13 | 20c632a6 |
14 | 133d5b81 |
15 | b6574db |
hex | 7c1a425 |
130130981 has 8 divisors (see below), whose sum is σ = 137598720. Its totient is φ = 122725152.
The previous prime is 130130947. The next prime is 130131011. The reversal of 130130981 is 189031031.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 130130981 - 214 = 130114597 is a prime.
It is a super-2 number, since 2×1301309812 = 33868144432044722, which contains 22 as substring.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 130130981.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (130130381) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11120 + ... + 19593.
It is an arithmetic number, because the mean of its divisors is an integer number (17199840).
Almost surely, 2130130981 is an apocalyptic number.
It is an amenable number.
130130981 is a deficient number, since it is larger than the sum of its proper divisors (7467739).
130130981 is a wasteful number, since it uses less digits than its factorization.
130130981 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 30955.
The product of its (nonzero) digits is 648, while the sum is 26.
The square root of 130130981 is about 11407.4967017308. The cubic root of 130130981 is about 506.7497789461.
The spelling of 130130981 in words is "one hundred thirty million, one hundred thirty thousand, nine hundred eighty-one".
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