315235009 has 2 divisors, whose sum is σ = 315235010. Its totient is φ = 315235008.

The previous prime is 315234967. The next prime is 315235013. The reversal of 315235009 is 900532513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206554384 + 108680625 = 14372^2 + 10425^2 .

It is an emirp because it is prime and its reverse (900532513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315235009 - 2⁹ = 315234497 is a prime.

It is a super-2 number, since 2×315235009² = 198746221798460162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315230009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157617504 + 157617505.

It is an arithmetic number, because the mean of its divisors is an integer number (157617505).

Almost surely, 2^315235009 is an apocalyptic number.

It is an amenable number.

315235009 is a deficient number, since it is larger than the sum of its proper divisors (1).

315235009 is an equidigital number, since it uses as much as digits as its factorization.

315235009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 315235009 is about 17754.8587434539. The cubic root of 315235009 is about 680.5783783036.

The spelling of 315235009 in words is "three hundred fifteen million, two hundred thirty-five thousand, nine".