Base | Representation |
---|---|
bin | 100111001001010… |
… | …1011111010100011 |
3 | 10101112121210111121 |
4 | 1032102223322203 |
5 | 10142230140230 |
6 | 334201153111 |
7 | 44356514131 |
oct | 11622537243 |
9 | 3345553447 |
10 | 1313521315 |
11 | 6144a3007 |
12 | 307a8b797 |
13 | 17c190562 |
14 | c6640751 |
15 | 7a4b177a |
hex | 4e4abea3 |
1313521315 has 4 divisors (see below), whose sum is σ = 1576225584. Its totient is φ = 1050817048.
The previous prime is 1313521291. The next prime is 1313521327. The reversal of 1313521315 is 5131253131.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5131253131 = 347 ⋅14787473.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1313521315 is a prime.
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 1313521315.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131352127 + ... + 131352136.
It is an arithmetic number, because the mean of its divisors is an integer number (394056396).
Almost surely, 21313521315 is an apocalyptic number.
1313521315 is a deficient number, since it is larger than the sum of its proper divisors (262704269).
1313521315 is an equidigital number, since it uses as much as digits as its factorization.
1313521315 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 262704268.
The product of its digits is 1350, while the sum is 25.
The square root of 1313521315 is about 36242.5346105926. The cubic root of 1313521315 is about 1095.1637029981.
Adding to 1313521315 its reverse (5131253131), we get a palindrome (6444774446).
The spelling of 1313521315 in words is "one billion, three hundred thirteen million, five hundred twenty-one thousand, three hundred fifteen".
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