Base | Representation |
---|---|
bin | 1110101111111… |
… | …1110010101011 |
3 | 11022102002000011 |
4 | 3223333302223 |
5 | 111314141011 |
6 | 10045552351 |
7 | 1350562546 |
oct | 353776253 |
9 | 138362004 |
10 | 61865131 |
11 | 31a15209 |
12 | 188756b7 |
13 | ca80bb3 |
14 | 830585d |
15 | 5670621 |
hex | 3affcab |
61865131 has 2 divisors, whose sum is σ = 61865132. Its totient is φ = 61865130.
The previous prime is 61865107. The next prime is 61865161. The reversal of 61865131 is 13156816.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 61865131 - 213 = 61856939 is a prime.
It is a super-2 number, since 2×618651312 = 7654588867294322, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 61865093 and 61865102.
It is not a weakly prime, because it can be changed into another prime (61865161) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30932565 + 30932566.
It is an arithmetic number, because the mean of its divisors is an integer number (30932566).
Almost surely, 261865131 is an apocalyptic number.
61865131 is a deficient number, since it is larger than the sum of its proper divisors (1).
61865131 is an equidigital number, since it uses as much as digits as its factorization.
61865131 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 4320, while the sum is 31.
The square root of 61865131 is about 7865.4390214406. The cubic root of 61865131 is about 395.5019650491.
The spelling of 61865131 in words is "sixty-one million, eight hundred sixty-five thousand, one hundred thirty-one".
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