511031280491 has 2 divisors, whose sum is σ = 511031280492. Its totient is φ = 511031280490.

The previous prime is 511031280479. The next prime is 511031280523. The reversal of 511031280491 is 194082130115.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 511031280491 - 2¹⁸ = 511031018347 is a prime.

It is a super-2 number, since 2×511031280491² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (511031280191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255515640245 + 255515640246.

It is an arithmetic number, because the mean of its divisors is an integer number (255515640246).

Almost surely, 2^511031280491 is an apocalyptic number.

511031280491 is a deficient number, since it is larger than the sum of its proper divisors (1).

511031280491 is an equidigital number, since it uses as much as digits as its factorization.

511031280491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 35.

The spelling of 511031280491 in words is "five hundred eleven billion, thirty-one million, two hundred eighty thousand, four hundred ninety-one".