315868541 has 2 divisors, whose sum is σ = 315868542. Its totient is φ = 315868540.

The previous prime is 315868537. The next prime is 315868549. The reversal of 315868541 is 145868513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 301161316 + 14707225 = 17354^2 + 3835^2 .

It is a cyclic number.

It is not a de Polignac number, because 315868541 - 2² = 315868537 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315868549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157934270 + 157934271.

It is an arithmetic number, because the mean of its divisors is an integer number (157934271).

Almost surely, 2^315868541 is an apocalyptic number.

It is an amenable number.

315868541 is a deficient number, since it is larger than the sum of its proper divisors (1).

315868541 is an equidigital number, since it uses as much as digits as its factorization.

315868541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 41.

The square root of 315868541 is about 17772.6908767356. The cubic root of 315868541 is about 681.0339956995.

The spelling of 315868541 in words is "three hundred fifteen million, eight hundred sixty-eight thousand, five hundred forty-one".