315005549 has 2 divisors, whose sum is σ = 315005550. Its totient is φ = 315005548.

The previous prime is 315005533. The next prime is 315005591. The reversal of 315005549 is 945500513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298252900 + 16752649 = 17270^2 + 4093^2 .

It is an emirp because it is prime and its reverse (945500513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315005549 - 2⁴ = 315005533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315005599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157502774 + 157502775.

It is an arithmetic number, because the mean of its divisors is an integer number (157502775).

Almost surely, 2^315005549 is an apocalyptic number.

It is an amenable number.

315005549 is a deficient number, since it is larger than the sum of its proper divisors (1).

315005549 is an equidigital number, since it uses as much as digits as its factorization.

315005549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 315005549 is about 17748.3956739757. The cubic root of 315005549 is about 680.4132069060.

The spelling of 315005549 in words is "three hundred fifteen million, five thousand, five hundred forty-nine".