511205054441 has 2 divisors, whose sum is σ = 511205054442. Its totient is φ = 511205054440.

The previous prime is 511205054407. The next prime is 511205054443. The reversal of 511205054441 is 144450502115.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 508090968025 + 3114086416 = 712805^2 + 55804^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511205054441 is a prime.

It is a super-2 number, since 2×511205054441² (a number of 24 digits) contains 22 as substring.

Together with 511205054443, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 511205054398 and 511205054407.

It is not a weakly prime, because it can be changed into another prime (511205054443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255602527220 + 255602527221.

It is an arithmetic number, because the mean of its divisors is an integer number (255602527221).

Almost surely, 2^511205054441 is an apocalyptic number.

It is an amenable number.

511205054441 is a deficient number, since it is larger than the sum of its proper divisors (1).

511205054441 is an equidigital number, since it uses as much as digits as its factorization.

511205054441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 511205054441 its reverse (144450502115), we get a palindrome (655655556556).

The spelling of 511205054441 in words is "five hundred eleven billion, two hundred five million, fifty-four thousand, four hundred forty-one".