Base | Representation |
---|---|
bin | 100111001000101… |
… | …1110010000011111 |
3 | 10101112000122011201 |
4 | 1032101132100133 |
5 | 10142140000411 |
6 | 334150300331 |
7 | 44354020564 |
oct | 11621362037 |
9 | 3345018151 |
10 | 1313203231 |
11 | 6142a602a |
12 | 3079576a7 |
13 | 17c0ab842 |
14 | c659a86b |
15 | 7a44c3c1 |
hex | 4e45e41f |
1313203231 has 4 divisors (see below), whose sum is σ = 1313487864. Its totient is φ = 1312918600.
The previous prime is 1313203163. The next prime is 1313203237. The reversal of 1313203231 is 1323023131.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323023131 = 1103 ⋅1199477.
It is a cyclic number.
It is not a de Polignac number, because 1313203231 - 227 = 1178985503 is a prime.
It is a super-2 number, since 2×13132032312 = 3449005451817678722, which contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1313203199 and 1313203208.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1313203237) 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, 135280 + ... + 144661.
It is an arithmetic number, because the mean of its divisors is an integer number (328371966).
Almost surely, 21313203231 is an apocalyptic number.
1313203231 is a deficient number, since it is larger than the sum of its proper divisors (284633).
1313203231 is an equidigital number, since it uses as much as digits as its factorization.
1313203231 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 284632.
The product of its (nonzero) digits is 324, while the sum is 19.
The square root of 1313203231 is about 36238.1460756480. The cubic root of 1313203231 is about 1095.0752937808.
Adding to 1313203231 its reverse (1323023131), we get a palindrome (2636226362).
The spelling of 1313203231 in words is "one billion, three hundred thirteen million, two hundred three thousand, two hundred thirty-one".
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