The Number

31

Thirty-One

In Base 2 Binary Is

111112

The numbers with a 2 subscript use Base 2 Binary notation.

For more familiar numbers: See Thirty-One in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

28
111002
Twenty-Eight in Base 2 Binary
29
111012
Twenty-Nine in Base 2 Binary
30
111102
Thirty in Base 2 Binary
32
1000002
Thirty-Two in Base 2 Binary
33
1000012
Thirty-Three in Base 2 Binary
34
1000102
Thirty-Four in Base 2 Binary

Scientific Notation

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

3.1e1

Reciprocal

A number multiplied with its reciprocal is one.

0.00001000010000100001000010000100001000010000100001000012

The reciprocal of 31 in Base 2 Binary.

Palindrome?

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

The number 111112 is a palindrome.

A Prime Number

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

Thirty-one is the 11th prime number.   See primes in Base 2 Binary

Not A Composite

Composites have more than just these two factors.

Thirty-One is not a composite number because it has exactly two factors: One and Thirty-One

Prime Factors

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

The number thirty-one has the following 1 prime factor:

31
111112
Thirty-One in Base 2 Binary

Prime Factorization

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

1111121 = 111112

Base Conversions

The number thirty-one in 35 different bases