Base | Representation |
---|---|

bin | 1001101001101101110000… |

… | …00100101110011111000000 |

3 | 2210011001012101222211012011 |

4 | 10310312320010232133000 |

5 | 10240220310021000011 |

6 | 113050224410542304 |

7 | 4320264301250062 |

oct | 464667004563700 |

9 | 83131171884164 |

10 | 21224521656256 |

11 | 68432a6175446 |

12 | 2469555437994 |

13 | bac604c930c9 |

14 | 5353b53b3732 |

15 | 26c172757621 |

hex | 134db812e7c0 |

21224521656256 has 28 divisors (see below), whose sum is σ = 42710613130800. Its totient is φ = 10462792363520.

The previous prime is 21224521656199. The next prime is 21224521656311. The reversal of 21224521656256 is 65265612542212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2335440181 + ... + 2335449268.

Almost surely, 2^{21224521656256} is an apocalyptic number.

It is an amenable number.

21224521656256 is an abundant number, since it is smaller than the sum of its proper divisors (21486091474544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21224521656256 is an equidigital number, since it uses as much as digits as its factorization.

21224521656256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4670889532 (or 4670889522 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 49.

The spelling of 21224521656256 in words is "twenty-one trillion, two hundred twenty-four billion, five hundred twenty-one million, six hundred fifty-six thousand, two hundred fifty-six".

Divisors: 1 2 4 8 16 32 64 71 142 284 568 1136 2272 4544 4670889449 9341778898 18683557796 37367115592 74734231184 149468462368 298936924736 331633150879 663266301758 1326532603516 2653065207032 5306130414064 10612260828128 21224521656256

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