516809801 has 2 divisors, whose sum is σ = 516809802. Its totient is φ = 516809800.

The previous prime is 516809771. The next prime is 516809807. The reversal of 516809801 is 108908615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485056576 + 31753225 = 22024^2 + 5635^2 .

It is a cyclic number.

It is not a de Polignac number, because 516809801 - 2¹⁸ = 516547657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (516809807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258404900 + 258404901.

It is an arithmetic number, because the mean of its divisors is an integer number (258404901).

Almost surely, 2^516809801 is an apocalyptic number.

It is an amenable number.

516809801 is a deficient number, since it is larger than the sum of its proper divisors (1).

516809801 is an equidigital number, since it uses as much as digits as its factorization.

516809801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 516809801 is about 22733.4511458335. The cubic root of 516809801 is about 802.4973009359.

The spelling of 516809801 in words is "five hundred sixteen million, eight hundred nine thousand, eight hundred one".