315309 has 8 divisors (see below), whose sum is σ = 427552. Its totient is φ = 206640.

The previous prime is 315281. The next prime is 315313. The reversal of 315309 is 903513.

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

It is not a de Polignac number, because 315309 - 2⁷ = 315181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315349) 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, 679 + ... + 1044.

It is an arithmetic number, because the mean of its divisors is an integer number (53444).

2³¹⁵³⁰⁹ is an apocalyptic number.

It is an amenable number.

315309 is a deficient number, since it is larger than the sum of its proper divisors (112243).

315309 is a wasteful number, since it uses less digits than its factorization.

315309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787.

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 315309 is about 561.5238196194. The cubic root of 315309 is about 68.0631621899.

The spelling of 315309 in words is "three hundred fifteen thousand, three hundred nine".