315618263 has 2 divisors, whose sum is σ = 315618264. Its totient is φ = 315618262.

The previous prime is 315618257. The next prime is 315618313. The reversal of 315618263 is 362816513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315618263 - 2²⁰ = 314569687 is a prime.

It is a super-2 number, since 2×315618263² = 199229775878274338, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315615263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157809131 + 157809132.

It is an arithmetic number, because the mean of its divisors is an integer number (157809132).

Almost surely, 2^315618263 is an apocalyptic number.

315618263 is a deficient number, since it is larger than the sum of its proper divisors (1).

315618263 is an equidigital number, since it uses as much as digits as its factorization.

315618263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 315618263 is about 17765.6483979617. The cubic root of 315618263 is about 680.8540760578.

The spelling of 315618263 in words is "three hundred fifteen million, six hundred eighteen thousand, two hundred sixty-three".