Base | Representation |
---|---|
bin | 11011011011110… |
… | …00010110111011 |
3 | 121001000212120020 |
4 | 31231320112323 |
5 | 432403144011 |
6 | 34500301523 |
7 | 5463040146 |
oct | 1555702673 |
9 | 531025506 |
10 | 230131131 |
11 | 1089a2a1a |
12 | 650a18a3 |
13 | 388a6b89 |
14 | 227c705d |
15 | 1530c006 |
hex | db785bb |
230131131 has 8 divisors (see below), whose sum is σ = 311421504. Its totient is φ = 151130760.
The previous prime is 230131117. The next prime is 230131133. The reversal of 230131131 is 131131032.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 230131131 - 27 = 230131003 is a prime.
It is a super-2 number, since 2×2301311312 = 105920674910678322, which contains 22 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 230131131.
It is not an unprimeable number, because it can be changed into a prime (230131133) 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, 572265 + ... + 572666.
It is an arithmetic number, because the mean of its divisors is an integer number (38927688).
Almost surely, 2230131131 is an apocalyptic number.
230131131 is a deficient number, since it is larger than the sum of its proper divisors (81290373).
230131131 is a wasteful number, since it uses less digits than its factorization.
230131131 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1145001.
The product of its (nonzero) digits is 54, while the sum is 15.
The square root of 230131131 is about 15170.0735331112. The cubic root of 230131131 is about 612.8089845158.
Adding to 230131131 its reverse (131131032), we get a palindrome (361262163).
Subtracting from 230131131 its reverse (131131032), we obtain a palindrome (99000099).
The spelling of 230131131 in words is "two hundred thirty million, one hundred thirty-one thousand, one hundred thirty-one".
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