1315648517 has 4 divisors (see below), whose sum is σ = 1316307360. Its totient is φ = 1314989676.

The previous prime is 1315648441. The next prime is 1315648573. The reversal of 1315648517 is 7158465131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1315648517 - 2⁸ = 1315648261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315648577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326417 + ... + 330422.

It is an arithmetic number, because the mean of its divisors is an integer number (329076840).

Almost surely, 2^1315648517 is an apocalyptic number.

It is an amenable number.

1315648517 is a deficient number, since it is larger than the sum of its proper divisors (658843).

1315648517 is an equidigital number, since it uses as much as digits as its factorization.

1315648517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658842.

The product of its digits is 100800, while the sum is 41.

The square root of 1315648517 is about 36271.8694996550. The cubic root of 1315648517 is about 1095.7545772981.

The spelling of 1315648517 in words is "one billion, three hundred fifteen million, six hundred forty-eight thousand, five hundred seventeen".