315941257 has 2 divisors, whose sum is σ = 315941258. Its totient is φ = 315941256.

The previous prime is 315941237. The next prime is 315941281. The reversal of 315941257 is 752149513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312016896 + 3924361 = 17664^2 + 1981^2 .

It is a cyclic number.

It is not a de Polignac number, because 315941257 - 2¹¹ = 315939209 is a prime.

It is not a weakly prime, because it can be changed into another prime (315941237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157970628 + 157970629.

It is an arithmetic number, because the mean of its divisors is an integer number (157970629).

Almost surely, 2^315941257 is an apocalyptic number.

It is an amenable number.

315941257 is a deficient number, since it is larger than the sum of its proper divisors (1).

315941257 is an equidigital number, since it uses as much as digits as its factorization.

315941257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 315941257 is about 17774.7364818722. The cubic root of 315941257 is about 681.0862518989.

The spelling of 315941257 in words is "three hundred fifteen million, nine hundred forty-one thousand, two hundred fifty-seven".