315145417 has 2 divisors, whose sum is σ = 315145418. Its totient is φ = 315145416.

The previous prime is 315145399. The next prime is 315145423. The reversal of 315145417 is 714541513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297873081 + 17272336 = 17259^2 + 4156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315145417 is a prime.

It is a super-2 number, since 2×315145417² = 198633267712207778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315145447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157572708 + 157572709.

It is an arithmetic number, because the mean of its divisors is an integer number (157572709).

Almost surely, 2^315145417 is an apocalyptic number.

It is an amenable number.

315145417 is a deficient number, since it is larger than the sum of its proper divisors (1).

315145417 is an equidigital number, since it uses as much as digits as its factorization.

315145417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 31.

The square root of 315145417 is about 17752.3355364865. The cubic root of 315145417 is about 680.5138971454.

The spelling of 315145417 in words is "three hundred fifteen million, one hundred forty-five thousand, four hundred seventeen".