315997247 has 8 divisors (see below), whose sum is σ = 318716640. Its totient is φ = 313286400.

The previous prime is 315997243. The next prime is 315997261. The reversal of 315997247 is 742799513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 315997247 - 2² = 315997243 is a prime.

It is a super-2 number, since 2×315997247² = 199708520223158018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315997243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87779 + ... + 91307.

It is an arithmetic number, because the mean of its divisors is an integer number (39839580).

Almost surely, 2^315997247 is an apocalyptic number.

315997247 is a deficient number, since it is larger than the sum of its proper divisors (2719393).

315997247 is a wasteful number, since it uses less digits than its factorization.

315997247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273.

The product of its digits is 476280, while the sum is 47.

The square root of 315997247 is about 17776.3114002877. The cubic root of 315997247 is about 681.1264827604.

The spelling of 315997247 in words is "three hundred fifteen million, nine hundred ninety-seven thousand, two hundred forty-seven".