516991271 has 2 divisors, whose sum is σ = 516991272. Its totient is φ = 516991270.

The previous prime is 516991261. The next prime is 516991289. The reversal of 516991271 is 172199615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 516991271 - 2²² = 512796967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516991261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258495635 + 258495636.

It is an arithmetic number, because the mean of its divisors is an integer number (258495636).

Almost surely, 2^516991271 is an apocalyptic number.

516991271 is a deficient number, since it is larger than the sum of its proper divisors (1).

516991271 is an equidigital number, since it uses as much as digits as its factorization.

516991271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 41.

The square root of 516991271 is about 22737.4420505034. The cubic root of 516991271 is about 802.5912182358.

The spelling of 516991271 in words is "five hundred sixteen million, nine hundred ninety-one thousand, two hundred seventy-one".