Base | Representation |
---|---|
bin | 111100111111010… |
… | …100000101001001 |
3 | 2122022101111001211 |
4 | 330333110011021 |
5 | 4043421332111 |
6 | 245311213121 |
7 | 34233212443 |
oct | 7477240511 |
9 | 2568344054 |
10 | 1023230281 |
11 | 485650067 |
12 | 2468171a1 |
13 | 133cb1a08 |
14 | 99c77493 |
15 | 5ec6e521 |
hex | 3cfd4149 |
1023230281 has 2 divisors, whose sum is σ = 1023230282. Its totient is φ = 1023230280.
The previous prime is 1023230261. The next prime is 1023230347. The reversal of 1023230281 is 1820323201.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 978125625 + 45104656 = 31275^2 + 6716^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1023230281 is a prime.
It is a super-2 number, since 2×10232302812 = 2094000415910677922, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (1023230251) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511615140 + 511615141.
It is an arithmetic number, because the mean of its divisors is an integer number (511615141).
Almost surely, 21023230281 is an apocalyptic number.
It is an amenable number.
1023230281 is a deficient number, since it is larger than the sum of its proper divisors (1).
1023230281 is an equidigital number, since it uses as much as digits as its factorization.
1023230281 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 576, while the sum is 22.
The square root of 1023230281 is about 31987.9708796916. The cubic root of 1023230281 is about 1007.6842283896.
Adding to 1023230281 its reverse (1820323201), we get a palindrome (2843553482).
The spelling of 1023230281 in words is "one billion, twenty-three million, two hundred thirty thousand, two hundred eighty-one".
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