Base | Representation |
---|---|
bin | 11100111010010… |
… | …01011001000001 |
3 | 121220100101011220 |
4 | 32131021121001 |
5 | 444041143130 |
6 | 40022025253 |
7 | 6003254151 |
oct | 1635113101 |
9 | 556311156 |
10 | 242521665 |
11 | 114996131 |
12 | 69278229 |
13 | 3b324859 |
14 | 242d0761 |
15 | 16458410 |
hex | e749641 |
242521665 has 32 divisors (see below), whose sum is σ = 396403200. Its totient is φ = 126577920.
The previous prime is 242521651. The next prime is 242521691. The reversal of 242521665 is 566125242.
It is not a de Polignac number, because 242521665 - 25 = 242521633 is a prime.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218131 + ... + 219239.
It is an arithmetic number, because the mean of its divisors is an integer number (12387600).
Almost surely, 2242521665 is an apocalyptic number.
It is an amenable number.
242521665 is a deficient number, since it is larger than the sum of its proper divisors (153881535).
242521665 is a wasteful number, since it uses less digits than its factorization.
242521665 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1417.
The product of its digits is 28800, while the sum is 33.
The square root of 242521665 is about 15573.1071080886. The cubic root of 242521665 is about 623.6154224437.
It can be divided in two parts, 2425 and 21665, that added together give a triangular number (24090 = T219).
The spelling of 242521665 in words is "two hundred forty-two million, five hundred twenty-one thousand, six hundred sixty-five".
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