Base | Representation |
---|---|
bin | 11001101100000… |
… | …11100110010101 |
3 | 120000111101110102 |
4 | 30312003212111 |
5 | 420131401414 |
6 | 33214503445 |
7 | 5224460312 |
oct | 1466034625 |
9 | 500441412 |
10 | 215497109 |
11 | 100708193 |
12 | 60204b85 |
13 | 35851ca9 |
14 | 20897d09 |
15 | 13dbaede |
hex | cd83995 |
215497109 has 2 divisors, whose sum is σ = 215497110. Its totient is φ = 215497108.
The previous prime is 215497103. The next prime is 215497157. The reversal of 215497109 is 901794512.
215497109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 213598225 + 1898884 = 14615^2 + 1378^2 .
It is a cyclic number.
It is not a de Polignac number, because 215497109 - 212 = 215493013 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (215497103) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107748554 + 107748555.
It is an arithmetic number, because the mean of its divisors is an integer number (107748555).
Almost surely, 2215497109 is an apocalyptic number.
It is an amenable number.
215497109 is a deficient number, since it is larger than the sum of its proper divisors (1).
215497109 is an equidigital number, since it uses as much as digits as its factorization.
215497109 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 22680, while the sum is 38.
The square root of 215497109 is about 14679.8197877222. The cubic root of 215497109 is about 599.5339983497.
The spelling of 215497109 in words is "two hundred fifteen million, four hundred ninety-seven thousand, one hundred nine".
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