511771 has 4 divisors (see below), whose sum is σ = 551152. Its totient is φ = 472392.

The previous prime is 511757. The next prime is 511787. The reversal of 511771 is 177115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177115 = 5 ⋅35423.

It is a 10-Lehmer number, since φ(511771) divides (511771-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 511771 - 2¹¹ = 509723 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (511711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19671 + ... + 19696.

It is an arithmetic number, because the mean of its divisors is an integer number (137788).

2⁵¹¹⁷⁷¹ is an apocalyptic number.

511771 is a deficient number, since it is larger than the sum of its proper divisors (39381).

511771 is a wasteful number, since it uses less digits than its factorization.

511771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39380.

The product of its digits is 245, while the sum is 22.

The square root of 511771 is about 715.3817162886. The cubic root of 511771 is about 79.9880711380.

Adding to 511771 its reverse (177115), we get a palindrome (688886).

The spelling of 511771 in words is "five hundred eleven thousand, seven hundred seventy-one".