315262513 has 4 divisors (see below), whose sum is σ = 318512740. Its totient is φ = 312012288.

The previous prime is 315262487. The next prime is 315262559.

315262513 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 197908624 + 117353889 = 14068^2 + 10833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315262513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315262313) 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, 1624968 + ... + 1625161.

It is an arithmetic number, because the mean of its divisors is an integer number (79628185).

Almost surely, 2^315262513 is an apocalyptic number.

It is an amenable number.

315262513 is a deficient number, since it is larger than the sum of its proper divisors (3250227).

315262513 is an equidigital number, since it uses as much as digits as its factorization.

315262513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250226.

The product of its digits is 5400, while the sum is 28.

The square root of 315262513 is about 17755.6332751046. The cubic root of 315262513 is about 680.5981710326.

The spelling of 315262513 in words is "three hundred fifteen million, two hundred sixty-two thousand, five hundred thirteen".