516331001 has 2 divisors, whose sum is σ = 516331002. Its totient is φ = 516331000.

The previous prime is 516330989. The next prime is 516331003. The reversal of 516331001 is 100133615.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420291001 + 96040000 = 20501^2 + 9800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516331001 is a prime.

Together with 516331003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (516331003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258165500 + 258165501.

It is an arithmetic number, because the mean of its divisors is an integer number (258165501).

Almost surely, 2^516331001 is an apocalyptic number.

It is an amenable number.

516331001 is a deficient number, since it is larger than the sum of its proper divisors (1).

516331001 is an equidigital number, since it uses as much as digits as its factorization.

516331001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 516331001 is about 22722.9179684300. The cubic root of 516331001 is about 802.2493990147.

Adding to 516331001 its reverse (100133615), we get a palindrome (616464616).

The spelling of 516331001 in words is "five hundred sixteen million, three hundred thirty-one thousand, one".