315868481 has 2 divisors, whose sum is σ = 315868482. Its totient is φ = 315868480.

The previous prime is 315868471. The next prime is 315868513. The reversal of 315868481 is 184868513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280060225 + 35808256 = 16735^2 + 5984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315868481 is a prime.

It is a super-2 number, since 2×315868481² = 199545794578494722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315868451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157934240 + 157934241.

It is an arithmetic number, because the mean of its divisors is an integer number (157934241).

Almost surely, 2^315868481 is an apocalyptic number.

It is an amenable number.

315868481 is a deficient number, since it is larger than the sum of its proper divisors (1).

315868481 is an equidigital number, since it uses as much as digits as its factorization.

315868481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 44.

The square root of 315868481 is about 17772.6891887525. The cubic root of 315868481 is about 681.0339525782.

The spelling of 315868481 in words is "three hundred fifteen million, eight hundred sixty-eight thousand, four hundred eighty-one".