Base | Representation |
---|---|
bin | 1011111010101… |
… | …01100100100101 |
3 | 20222002202111121 |
4 | 11331111210211 |
5 | 201042341341 |
6 | 13530333541 |
7 | 2322455536 |
oct | 575254445 |
9 | 228082447 |
10 | 99965221 |
11 | 51478394 |
12 | 2958a2b1 |
13 | 17930a25 |
14 | d3c268d |
15 | 8b994d1 |
hex | 5f55925 |
99965221 has 2 divisors, whose sum is σ = 99965222. Its totient is φ = 99965220.
The previous prime is 99965209. The next prime is 99965263. The reversal of 99965221 is 12256999.
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 99720196 + 245025 = 9986^2 + 495^2 .
It is a cyclic number.
It is not a de Polignac number, because 99965221 - 25 = 99965189 is a prime.
It is equal to p5759566 and since 99965221 and 5759566 have the same sum of digits, it is a Honaker prime.
It is a nialpdrome in base 10.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (99945221) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49982610 + 49982611.
It is an arithmetic number, because the mean of its divisors is an integer number (49982611).
Almost surely, 299965221 is an apocalyptic number.
It is an amenable number.
99965221 is a deficient number, since it is larger than the sum of its proper divisors (1).
99965221 is an equidigital number, since it uses as much as digits as its factorization.
99965221 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 87480, while the sum is 43.
The square root of 99965221 is about 9998.2608987763. The cubic root of 99965221 is about 464.1050671825.
The spelling of 99965221 in words is "ninety-nine million, nine hundred sixty-five thousand, two hundred twenty-one".
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