315212305 has 8 divisors (see below), whose sum is σ = 387480744. Its totient is φ = 246019200.

The previous prime is 315212297. The next prime is 315212311. The reversal of 315212305 is 503212513.

It can be written as a sum of positive squares in 4 ways, for example, as 46022656 + 269189649 = 6784^2 + 16407^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 315212305 - 2³ = 315212297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768606 + ... + 769015.

It is an arithmetic number, because the mean of its divisors is an integer number (48435093).

Almost surely, 2^315212305 is an apocalyptic number.

It is an amenable number.

315212305 is a deficient number, since it is larger than the sum of its proper divisors (72268439).

315212305 is a wasteful number, since it uses less digits than its factorization.

315212305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537667.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 315212305 is about 17754.2193576626. The cubic root of 315212305 is about 680.5620389356.

Adding to 315212305 its reverse (503212513), we get a palindrome (818424818).

The spelling of 315212305 in words is "three hundred fifteen million, two hundred twelve thousand, three hundred five".