315505513 has 4 divisors (see below), whose sum is σ = 329223168. Its totient is φ = 301787860.

The previous prime is 315505483. The next prime is 315505523.

315505513 is nontrivially palindromic in base 10.

It is the 7252-nd star number.

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 315505513 - 2¹⁷ = 315374441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315505523) 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, 6858793 + ... + 6858838.

It is an arithmetic number, because the mean of its divisors is an integer number (82305792).

Almost surely, 2^315505513 is an apocalyptic number.

It is an amenable number.

315505513 is a deficient number, since it is larger than the sum of its proper divisors (13717655).

315505513 is a wasteful number, since it uses less digits than its factorization.

315505513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13717654.

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 315505513 is about 17762.4748557176. The cubic root of 315505513 is about 680.7729913540.

The spelling of 315505513 in words is "three hundred fifteen million, five hundred five thousand, five hundred thirteen".