511151 has 2 divisors, whose sum is σ = 511152. Its totient is φ = 511150.

The previous prime is 511123. The next prime is 511153. The reversal of 511151 is 151115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 511151 - 2⁶ = 511087 is a prime.

It is a super-2 number, since 2×511151² = 522550689602, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 511153, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511153) 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 as a sum of consecutive naturals, namely, 255575 + 255576.

It is an arithmetic number, because the mean of its divisors is an integer number (255576).

2⁵¹¹¹⁵¹ is an apocalyptic number.

511151 is a deficient number, since it is larger than the sum of its proper divisors (1).

511151 is an equidigital number, since it uses as much as digits as its factorization.

511151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25, while the sum is 14.

The square root of 511151 is about 714.9482498755. The cubic root of 511151 is about 79.9557567862.

Adding to 511151 its reverse (151115), we get a palindrome (662266).

It can be divided in two parts, 5 and 11151, that multiplied together give a palindrome (55755).

The spelling of 511151 in words is "five hundred eleven thousand, one hundred fifty-one".