Base | Representation |
---|---|
bin | 1111101010101… |
… | …11011111000101 |
3 | 100011022100112102 |
4 | 13311113133011 |
5 | 232121232331 |
6 | 21013001445 |
7 | 3154065560 |
oct | 765273705 |
9 | 304270472 |
10 | 131430341 |
11 | 68209619 |
12 | 38023285 |
13 | 212c9843 |
14 | 136534d7 |
15 | b8124cb |
hex | 7d577c5 |
131430341 has 4 divisors (see below), whose sum is σ = 150206112. Its totient is φ = 112654572.
The previous prime is 131430319. The next prime is 131430371. The reversal of 131430341 is 143034131.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 143034131 = 127 ⋅1126253.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-131430341 is a prime.
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (131430371) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9387875 + ... + 9387888.
It is an arithmetic number, because the mean of its divisors is an integer number (37551528).
Almost surely, 2131430341 is an apocalyptic number.
It is an amenable number.
131430341 is a deficient number, since it is larger than the sum of its proper divisors (18775771).
131430341 is an equidigital number, since it uses as much as digits as its factorization.
131430341 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 18775770.
The product of its (nonzero) digits is 432, while the sum is 20.
The square root of 131430341 is about 11464.3072621070. The cubic root of 131430341 is about 508.4308311659.
Adding to 131430341 its reverse (143034131), we get a palindrome (274464472).
The spelling of 131430341 in words is "one hundred thirty-one million, four hundred thirty thousand, three hundred forty-one".
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