The Number

81990

Eighty-One Thousand Nine Hundred and Ninety

In Base 25 Pentavigesimal Is

564f25

The numbers with a 25 subscript use Base 25 Pentavigesimal notation.

For more familiar numbers: See Eighty-One Thousand Nine Hundred and Ninety in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

81987
564c25
Eighty-One Thousand Nine Hundred and Eighty-Seven in Base 25 Pentavigesimal
81988
564d25
Eighty-One Thousand Nine Hundred and Eighty-Eight in Base 25 Pentavigesimal
81989
564e25
Eighty-One Thousand Nine Hundred and Eighty-Nine in Base 25 Pentavigesimal
81991
564g25
Eighty-One Thousand Nine Hundred and Ninety-One in Base 25 Pentavigesimal
81992
564h25
Eighty-One Thousand Nine Hundred and Ninety-Two in Base 25 Pentavigesimal
81993
564i25
Eighty-One Thousand Nine Hundred and Ninety-Three in Base 25 Pentavigesimal

Scientific Notation

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

8.1990e4

Reciprocal

A number multiplied with its reciprocal is one.

0.0004j2h4m7i514k25

The reciprocal of 81990 in Base 25 Pentavigesimal.

Palindrome?

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

The number 564f25 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 nine hundred and ninety is a composite number with 24 total factors (including 1 and itself).   See primes in Base 25 Pentavigesimal

A Composite

Composites have more than just these two factors.

Eighty-one thousand nine hundred and ninety 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 nine hundred and ninety has the following 4 prime factors:

2
225
Two in Base 25 Pentavigesimal
3
325
Three in Base 25 Pentavigesimal
5
525
Five in Base 25 Pentavigesimal
911
1bb25
Nine Hundred and Eleven in Base 25 Pentavigesimal

Prime Factorization

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

2251 · 3252 · 5251 · 1bb251 = 564f25

Base Conversions

The number eighty-one thousand nine hundred and ninety in 35 different bases