2771

2771 is an integer in the decimal numeral system. It factors as the product of the prime numbers 17 and 163, so 2771 = 17 × 163. It is an odd, square-free semiprime with divisors 1, 17, 163, and 2771.

In number theory, 2771 has several notable properties. Its Euler totient is φ(2771) = (17−1)(163−1) = 16×162 = 2592. The sum of its digits is 2+7+7+1 = 17, giving a digital root of 8. In base representations, 2771 is 101011010011 in binary and AD3 in hexadecimal. In Roman numerals, it is written as MMDCCLXXI.

2771 also appears in various mathematical contexts as an example of a semiprime, a product of two distinct primes. It is not a prime, a perfect square, or a cube, and its divisors are limited to 1, 17, 163, and 2771. As a year, 2771 CE would lie in the distant future.

See also

17, 163, semiprime, Roman numerals, binary, hexadecimal.