# Divisors of the Positive Integer 31

1, 31## Sum of all the Divisors of 31, including itself

32## Sum of the Proper Divisors of 31

1## Properties of the number 31

The integer 31 is an**odd**number.

The integer 31 is a

**Prime**number.

1 is

*less than*31, so 31 is a

**deficient**number.

## The number 31 as a Roman Numeral

**XXXI**

## The number 31 in various Numeral Systems

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

2: | 11111 |

3: | 1011 |

4: | 133 |

5: | 111 |

6: | 51 |

7: | 43 |

8: | 37 |

9: | 34 |

10: | 31 |

11: | 29 |

12: | 27 |

13: | 25 |

14: | 23 |

15: | 21 |

16: | 1F |

17: | 1E |

18: | 1D |

19: | 1C |

20: | 1B |

21: | 1A |

22: | 19 |

23: | 18 |

24: | 17 |

25: | 16 |

26: | 15 |

27: | 14 |

28: | 13 |

29: | 12 |

30: | 11 |

31: | 10 |

32: | V |

33: | V |

34: | V |

35: | V |

36: | V |