| Base | Representation |
|---|---|
| bin | 100111000100111… |
| … | …0101100000111111 |
| 3 | 10101101020221002201 |
| 4 | 1032021311200333 |
| 5 | 10141131420333 |
| 6 | 334035332331 |
| 7 | 44331012304 |
| oct | 11611654077 |
| 9 | 3341227081 |
| 10 | 1311201343 |
| 11 | 613158a81 |
| 12 | 3071510a7 |
| 13 | 17b85a5aa |
| 14 | c61d90ab |
| 15 | 7a1a417d |
| hex | 4e27583f |
1311201343 has 4 divisors (see below), whose sum is σ = 1380211960. Its totient is φ = 1242190728.
The previous prime is 1311201337. The next prime is 1311201349. The reversal of 1311201343 is 3431021131.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (1311201337) and next prime (1311201349).
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1311201343 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 69010597 = 1311201343 / (1 + 3 + 1 + 1 + 2 + 0 + 1 + 3 + 4 + 3).
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 1311201343.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1311201349) by changing a digit.
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, 34505280 + ... + 34505317.
It is an arithmetic number, because the mean of its divisors is an integer number (345052990).
Almost surely, 21311201343 is an apocalyptic number.
1311201343 is a deficient number, since it is larger than the sum of its proper divisors (69010617).
1311201343 is an equidigital number, since it uses as much as digits as its factorization.
1311201343 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 69010616.
The product of its (nonzero) digits is 216, while the sum is 19.
The square root of 1311201343 is about 36210.5142603637. The cubic root of 1311201343 is about 1094.5185551272.
Adding to 1311201343 its reverse (3431021131), we get a palindrome (4742222474).
The spelling of 1311201343 in words is "one billion, three hundred eleven million, two hundred one thousand, three hundred forty-three".
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