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

bin | 101000000110… |

… | …0010101100011 |

3 | 1110120000211111 |

4 | 1100030111203 |

5 | 20340201201 |

6 | 2030324151 |

7 | 343453531 |

oct | 120142543 |

9 | 43500744 |

10 | 21022051 |

11 | 109591a6 |

12 | 7059657 |

13 | 44806ab |

14 | 2b13151 |

15 | 1ca3b51 |

hex | 140c563 |

21022051 has 2 divisors, whose sum is σ = 21022052. Its totient is φ = 21022050.

The previous prime is 21022049. The next prime is 21022063. The reversal of 21022051 is 15022012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21022051 - 2^{1} = 21022049 is a prime.

Together with 21022049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21022021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511025 + 10511026.

It is an arithmetic number, because the mean of its divisors is an integer number (10511026).

Almost surely, 2^{21022051} is an apocalyptic number.

21022051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022051 is an equidigital number, since it uses as much as digits as its factorization.

21022051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 21022051 is about 4584.9810250425. The cubic root of 21022051 is about 275.9889505833.

Adding to 21022051 its reverse (15022012), we get a palindrome (36044063).

The spelling of 21022051 in words is "twenty-one million, twenty-two thousand, fifty-one".

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