315206117 has 4 divisors (see below), whose sum is σ = 315640416. Its totient is φ = 314771820.

The previous prime is 315206113. The next prime is 315206119. The reversal of 315206117 is 711602513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 711602513 = 47 ⋅15140479.

It is a cyclic number.

It is not a de Polignac number, because 315206117 - 2² = 315206113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315206113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216059 + ... + 217512.

It is an arithmetic number, because the mean of its divisors is an integer number (78910104).

Almost surely, 2^315206117 is an apocalyptic number.

It is an amenable number.

315206117 is a deficient number, since it is larger than the sum of its proper divisors (434299).

315206117 is an equidigital number, since it uses as much as digits as its factorization.

315206117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434298.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 315206117 is about 17754.0450883735. The cubic root of 315206117 is about 680.5575854869.

The spelling of 315206117 in words is "three hundred fifteen million, two hundred six thousand, one hundred seventeen".