511020640243 has 2 divisors, whose sum is σ = 511020640244. Its totient is φ = 511020640242.

The previous prime is 511020640219. The next prime is 511020640279. The reversal of 511020640243 is 342046020115.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511020640243 is a prime.

It is a super-2 number, since 2×511020640243² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (511020640043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255510320121 + 255510320122.

It is an arithmetic number, because the mean of its divisors is an integer number (255510320122).

Almost surely, 2^511020640243 is an apocalyptic number.

511020640243 is a deficient number, since it is larger than the sum of its proper divisors (1).

511020640243 is an equidigital number, since it uses as much as digits as its factorization.

511020640243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 511020640243 its reverse (342046020115), we get a palindrome (853066660358).

The spelling of 511020640243 in words is "five hundred eleven billion, twenty million, six hundred forty thousand, two hundred forty-three".