315031117 has 2 divisors, whose sum is σ = 315031118. Its totient is φ = 315031116.

The previous prime is 315031081. The next prime is 315031169. The reversal of 315031117 is 711130513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205807716 + 109223401 = 14346^2 + 10451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315031117 is a prime.

It is equal to p_17021623 and since 315031117 and 17021623 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315031817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157515558 + 157515559.

It is an arithmetic number, because the mean of its divisors is an integer number (157515559).

Almost surely, 2^315031117 is an apocalyptic number.

It is an amenable number.

315031117 is a deficient number, since it is larger than the sum of its proper divisors (1).

315031117 is an equidigital number, since it uses as much as digits as its factorization.

315031117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 315, while the sum is 22.

The square root of 315031117 is about 17749.1159498156. The cubic root of 315031117 is about 680.4316154010.

The spelling of 315031117 in words is "three hundred fifteen million, thirty-one thousand, one hundred seventeen".