315205 has 12 divisors (see below), whose sum is σ = 416556. Its totient is φ = 228800.

The previous prime is 315199. The next prime is 315223. The reversal of 315205 is 502513.

It can be written as a sum of positive squares in 2 ways, for example, as 101761 + 213444 = 319^2 + 462^2 .

It is not a de Polignac number, because 315205 - 2⁹ = 314693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345 + ... + 865.

It is an arithmetic number, because the mean of its divisors is an integer number (34713).

2³¹⁵²⁰⁵ is an apocalyptic number.

It is an amenable number.

315205 is a deficient number, since it is larger than the sum of its proper divisors (101351).

315205 is a wasteful number, since it uses less digits than its factorization.

315205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 315205 is about 561.4312068277. The cubic root of 315205 is about 68.0556781586.

Adding to 315205 its reverse (502513), we get a palindrome (817718).

The spelling of 315205 in words is "three hundred fifteen thousand, two hundred five".