315192247 has 2 divisors, whose sum is σ = 315192248. Its totient is φ = 315192246.

The previous prime is 315192239. The next prime is 315192259. The reversal of 315192247 is 742291513.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315192247 - 2³ = 315192239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315192287) 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, 157596123 + 157596124.

It is an arithmetic number, because the mean of its divisors is an integer number (157596124).

Almost surely, 2^315192247 is an apocalyptic number.

315192247 is a deficient number, since it is larger than the sum of its proper divisors (1).

315192247 is an equidigital number, since it uses as much as digits as its factorization.

315192247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 315192247 is about 17753.6544688692. The cubic root of 315192247 is about 680.5476031593.

The spelling of 315192247 in words is "three hundred fifteen million, one hundred ninety-two thousand, two hundred forty-seven".