Number 2 - properties and curiosities

2 (number)

Number 2 properties

2 is an even number.
2 is a palindrome.
2 is a prime number, which means it is only divisible by 1 and itself.
2 is a Sophie Germain prime, which means that 2 x 2 + 1 = 5 is also a prime number.
2 is an Armstrong (or Narcissistic) number, which means it is the sum of its own digits each raised to the power of the number of digits.
2 is Fibonacci number #3.
2 is a Harshad number, which means it is divisible by the sum of its digits (2 = 2, and 2 is divisible by 2).
2 is the factorial number of 2 (2! = 2).

Prime factorization

Prime factorization of 2: 2.

Divisor count: 2

1, 2

Factors of 2 are: 1, 2.

In octal, 2 is represented as 2.

In binary, 2 is represented as 10.

In hex, 2 is represented as 2.

Roman numeral: II

Previous Next

Nearby primes: 3, 5, 7

Is 2 prime?
Yes, 2 is prime.

What are the factors of 2?
1, 2

What is 2 in binary?
10