The Number

81018

Eighty-One Thousand and Eightteen

In Base 7 Septenary Is

4551307

The numbers with a 7 subscript use Base 7 Septenary notation.

For more familiar numbers: See Eighty-One Thousand and Eightteen in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

81015
4551247
Eighty-One Thousand and Fifteen in Base 7 Septenary
81016
4551257
Eighty-One Thousand and Sixteen in Base 7 Septenary
81017
4551267
Eighty-One Thousand and Seventeen in Base 7 Septenary
81019
4551317
Eighty-One Thousand and Nineteen in Base 7 Septenary
81020
4551327
Eighty-One Thousand and Twenty in Base 7 Septenary
81021
4551337
Eighty-One Thousand and Twenty-One in Base 7 Septenary

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

8.1018e4

Reciprocal

A number multiplied with its reciprocal is one.

0.000001311040060345454437

The reciprocal of 81018 in Base 7 Septenary.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 4551307 is not a palindrome.

Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Eighty-one thousand and eightteen is a composite number with 24 total factors (including 1 and itself).   See primes in Base 7 Septenary

A Composite

Composites have more than just these two factors.

Eighty-one thousand and eightteen is a composite number with 24 total factors (including 1 and itself).

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number eighty-one thousand and eightteen has the following 4 prime factors:

2
27
Two in Base 7 Septenary
3
37
Three in Base 7 Septenary
7
107
Seven in Base 7 Septenary
643
16067
Six Hundred and Forty-Three in Base 7 Septenary

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

271 · 372 · 1071 · 160671 = 4551307

Base Conversions

The number eighty-one thousand and eightteen in 35 different bases