315157417 has 2 divisors, whose sum is σ = 315157418. Its totient is φ = 315157416.

The previous prime is 315157411. The next prime is 315157421. The reversal of 315157417 is 714751513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244109376 + 71048041 = 15624^2 + 8429^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315157417 is a prime.

It is a super-2 number, since 2×315157417² = 198648394980223778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315157411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157578708 + 157578709.

It is an arithmetic number, because the mean of its divisors is an integer number (157578709).

Almost surely, 2^315157417 is an apocalyptic number.

It is an amenable number.

315157417 is a deficient number, since it is larger than the sum of its proper divisors (1).

315157417 is an equidigital number, since it uses as much as digits as its factorization.

315157417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 34.

The square root of 315157417 is about 17752.6735169664. The cubic root of 315157417 is about 680.5225344947.

The spelling of 315157417 in words is "three hundred fifteen million, one hundred fifty-seven thousand, four hundred seventeen".