511005335081 has 2 divisors, whose sum is σ = 511005335082. Its totient is φ = 511005335080.

The previous prime is 511005335051. The next prime is 511005335083. The reversal of 511005335081 is 180533500115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265826861056 + 245178474025 = 515584^2 + 495155^2 .

It is a cyclic number.

It is not a de Polignac number, because 511005335081 - 2¹⁰ = 511005334057 is a prime.

It is a super-2 number, since 2×511005335081² (a number of 24 digits) contains 22 as substring.

Together with 511005335083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (511005335083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255502667540 + 255502667541.

It is an arithmetic number, because the mean of its divisors is an integer number (255502667541).

Almost surely, 2^511005335081 is an apocalyptic number.

It is an amenable number.

511005335081 is a deficient number, since it is larger than the sum of its proper divisors (1).

511005335081 is an equidigital number, since it uses as much as digits as its factorization.

511005335081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 32.

Adding to 511005335081 its reverse (180533500115), we get a palindrome (691538835196).

The spelling of 511005335081 in words is "five hundred eleven billion, five million, three hundred thirty-five thousand, eighty-one".