315711947 has 4 divisors (see below), whose sum is σ = 334283256. Its totient is φ = 297140640.

The previous prime is 315711901. The next prime is 315711983. The reversal of 315711947 is 749117513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 315711947 - 2⁸ = 315711691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315711947.

It is not an unprimeable number, because it can be changed into a prime (315711647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9285629 + ... + 9285662.

It is an arithmetic number, because the mean of its divisors is an integer number (83570814).

Almost surely, 2^315711947 is an apocalyptic number.

315711947 is a deficient number, since it is larger than the sum of its proper divisors (18571309).

315711947 is a wasteful number, since it uses less digits than its factorization.

315711947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18571308.

The product of its digits is 26460, while the sum is 38.

The square root of 315711947 is about 17768.2848637678. The cubic root of 315711947 is about 680.9214346686.

The spelling of 315711947 in words is "three hundred fifteen million, seven hundred eleven thousand, nine hundred forty-seven".