Base | Representation |
---|---|
bin | 100111001000111… |
… | …1011010000100101 |
3 | 10101112020200010100 |
4 | 1032101323100211 |
5 | 10142202301041 |
6 | 334153014313 |
7 | 44355024114 |
oct | 11621732045 |
9 | 3345220110 |
10 | 1313322021 |
11 | 614377300 |
12 | 3079b4399 |
13 | 17c12092b |
14 | c65cbc7b |
15 | 7a4726b6 |
hex | 4e47b425 |
1313322021 has 36 divisors (see below), whose sum is σ = 2092359724. Its totient is φ = 793203840.
The previous prime is 1313322019. The next prime is 1313322041. The reversal of 1313322021 is 1202233131.
1313322021 is a `hidden beast` number, since 131 + 332 + 202 + 1 = 666.
It can be written as a sum of positive squares in 2 ways, for example, as 645668100 + 667653921 = 25410^2 + 25839^2 .
It is not a de Polignac number, because 1313322021 - 21 = 1313322019 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1313321985 and 1313322003.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1313322001) by changing a digit.
It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 338931 + ... + 342783.
Almost surely, 21313322021 is an apocalyptic number.
1313322021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
1313322021 is a deficient number, since it is larger than the sum of its proper divisors (779037703).
1313322021 is a wasteful number, since it uses less digits than its factorization.
1313322021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4194 (or 4180 counting only the distinct ones).
The product of its (nonzero) digits is 216, while the sum is 18.
The square root of 1313322021 is about 36239.7850573096. The cubic root of 1313322021 is about 1095.1083122983.
Adding to 1313322021 its reverse (1202233131), we get a palindrome (2515555152).
The spelling of 1313322021 in words is "one billion, three hundred thirteen million, three hundred twenty-two thousand, twenty-one".
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