315727481 has 2 divisors, whose sum is σ = 315727482. Its totient is φ = 315727480.

The previous prime is 315727469. The next prime is 315727499. The reversal of 315727481 is 184727513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172685881 + 143041600 = 13141^2 + 11960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315727481 is a prime.

It is a super-2 number, since 2×315727481² = 199367684517210722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (315727421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157863740 + 157863741.

It is an arithmetic number, because the mean of its divisors is an integer number (157863741).

Almost surely, 2^315727481 is an apocalyptic number.

It is an amenable number.

315727481 is a deficient number, since it is larger than the sum of its proper divisors (1).

315727481 is an equidigital number, since it uses as much as digits as its factorization.

315727481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 315727481 is about 17768.7219855565. The cubic root of 315727481 is about 680.9326022959.

The spelling of 315727481 in words is "three hundred fifteen million, seven hundred twenty-seven thousand, four hundred eighty-one".