315775477 has 2 divisors, whose sum is σ = 315775478. Its totient is φ = 315775476.

The previous prime is 315775463. The next prime is 315775529. The reversal of 315775477 is 774577513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206238321 + 109537156 = 14361^2 + 10466^2 .

It is an emirp because it is prime and its reverse (774577513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315775477 - 2¹⁵ = 315742709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315775417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157887738 + 157887739.

It is an arithmetic number, because the mean of its divisors is an integer number (157887739).

Almost surely, 2^315775477 is an apocalyptic number.

It is an amenable number.

315775477 is a deficient number, since it is larger than the sum of its proper divisors (1).

315775477 is an equidigital number, since it uses as much as digits as its factorization.

315775477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720300, while the sum is 46.

The square root of 315775477 is about 17770.0725097001. The cubic root of 315775477 is about 680.9671050314.

The spelling of 315775477 in words is "three hundred fifteen million, seven hundred seventy-five thousand, four hundred seventy-seven".