315356257 has 2 divisors, whose sum is σ = 315356258. Its totient is φ = 315356256.

The previous prime is 315356231. The next prime is 315356267. The reversal of 315356257 is 752653513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204032656 + 111323601 = 14284^2 + 10551^2 .

It is an emirp because it is prime and its reverse (752653513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315356257 is a prime.

It is not a weakly prime, because it can be changed into another prime (315356267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157678128 + 157678129.

It is an arithmetic number, because the mean of its divisors is an integer number (157678129).

Almost surely, 2^315356257 is an apocalyptic number.

It is an amenable number.

315356257 is a deficient number, since it is larger than the sum of its proper divisors (1).

315356257 is an equidigital number, since it uses as much as digits as its factorization.

315356257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94500, while the sum is 37.

The square root of 315356257 is about 17758.2729171505. The cubic root of 315356257 is about 680.6656234672.

The spelling of 315356257 in words is "three hundred fifteen million, three hundred fifty-six thousand, two hundred fifty-seven".