2515717913 has 2 divisors, whose sum is σ = 2515717914. Its totient is φ = 2515717912.

The previous prime is 2515717907. The next prime is 2515717931. The reversal of 2515717913 is 3197175152.

Together with next prime (2515717931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1924401424 + 591316489 = 43868^2 + 24317^2 .

It is a cyclic number.

It is not a de Polignac number, because 2515717913 - 2⁸ = 2515717657 is a prime.

It is not a weakly prime, because it can be changed into another prime (2515717903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257858956 + 1257858957.

It is an arithmetic number, because the mean of its divisors is an integer number (1257858957).

Almost surely, 2^2515717913 is an apocalyptic number.

It is an amenable number.

2515717913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515717913 is an equidigital number, since it uses as much as digits as its factorization.

2515717913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66150, while the sum is 41.

The square root of 2515717913 is about 50156.9328508034. The cubic root of 2515717913 is about 1360.0472000992.

The spelling of 2515717913 in words is "two billion, five hundred fifteen million, seven hundred seventeen thousand, nine hundred thirteen".