315191147 has 2 divisors, whose sum is σ = 315191148. Its totient is φ = 315191146.

The previous prime is 315191143. The next prime is 315191179. The reversal of 315191147 is 741191513.

It is an a-pointer prime, because the next prime (315191179) can be obtained adding 315191147 to its sum of digits (32).

It is a weak prime.

It is an emirp because it is prime and its reverse (741191513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315191147 - 2² = 315191143 is a prime.

It is not a weakly prime, because it can be changed into another prime (315191141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157595573 + 157595574.

It is an arithmetic number, because the mean of its divisors is an integer number (157595574).

Almost surely, 2^315191147 is an apocalyptic number.

315191147 is a deficient number, since it is larger than the sum of its proper divisors (1).

315191147 is an equidigital number, since it uses as much as digits as its factorization.

315191147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 32.

The square root of 315191147 is about 17753.6234893049. The cubic root of 315191147 is about 680.5468114697.

The spelling of 315191147 in words is "three hundred fifteen million, one hundred ninety-one thousand, one hundred forty-seven".