6515515001 has 2 divisors, whose sum is σ = 6515515002. Its totient is φ = 6515515000.

The previous prime is 6515514997. The next prime is 6515515033. The reversal of 6515515001 is 1005155156.

It is a happy number.

6515515001 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5311494400 + 1204020601 = 72880^2 + 34699^2 .

It is a cyclic number.

It is not a de Polignac number, because 6515515001 - 2² = 6515514997 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 (6515515901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3257757500 + 3257757501.

It is an arithmetic number, because the mean of its divisors is an integer number (3257757501).

Almost surely, 2^6515515001 is an apocalyptic number.

It is an amenable number.

6515515001 is a deficient number, since it is larger than the sum of its proper divisors (1).

6515515001 is an equidigital number, since it uses as much as digits as its factorization.

6515515001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 6515515001 is about 80718.7400855588. The cubic root of 6515515001 is about 1867.7392681478.

The spelling of 6515515001 in words is "six billion, five hundred fifteen million, five hundred fifteen thousand, one".