315380843 has 4 divisors (see below), whose sum is σ = 316519680. Its totient is φ = 314242008.

The previous prime is 315380839. The next prime is 315380851. The reversal of 315380843 is 348083513.

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 315380843 - 2² = 315380839 is a prime.

It is a super-2 number, since 2×315380843² = 198930152262781298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315380873) 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, 569003 + ... + 569556.

It is an arithmetic number, because the mean of its divisors is an integer number (79129920).

Almost surely, 2^315380843 is an apocalyptic number.

315380843 is a deficient number, since it is larger than the sum of its proper divisors (1138837).

315380843 is a wasteful number, since it uses less digits than its factorization.

315380843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138836.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 315380843 is about 17758.9651443996. The cubic root of 315380843 is about 680.6833118326.

The spelling of 315380843 in words is "three hundred fifteen million, three hundred eighty thousand, eight hundred forty-three".