516171217 has 2 divisors, whose sum is σ = 516171218. Its totient is φ = 516171216.

The previous prime is 516171193. The next prime is 516171259. The reversal of 516171217 is 712171615.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439363521 + 76807696 = 20961^2 + 8764^2 .

It is a cyclic number.

It is not a de Polignac number, because 516171217 - 2¹¹ = 516169169 is a prime.

It is a super-2 number, since 2×516171217² = 532865450518522178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (516171517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258085608 + 258085609.

It is an arithmetic number, because the mean of its divisors is an integer number (258085609).

Almost surely, 2^516171217 is an apocalyptic number.

It is an amenable number.

516171217 is a deficient number, since it is larger than the sum of its proper divisors (1).

516171217 is an equidigital number, since it uses as much as digits as its factorization.

516171217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 31.

The square root of 516171217 is about 22719.4017746947. The cubic root of 516171217 is about 802.1666356692.

The spelling of 516171217 in words is "five hundred sixteen million, one hundred seventy-one thousand, two hundred seventeen".