315565 has 4 divisors (see below), whose sum is σ = 378684. Its totient is φ = 252448.

The previous prime is 315559. The next prime is 315569. The reversal of 315565 is 565513.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66564 + 249001 = 258^2 + 499^2 .

It is a cyclic number.

It is not a de Polignac number, because 315565 - 2⁷ = 315437 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 (315569) 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, 31552 + ... + 31561.

It is an arithmetic number, because the mean of its divisors is an integer number (94671).

2³¹⁵⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

315565 is a deficient number, since it is larger than the sum of its proper divisors (63119).

315565 is an equidigital number, since it uses as much as digits as its factorization.

315565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63118.

The product of its digits is 2250, while the sum is 25.

The square root of 315565 is about 561.7517245189. The cubic root of 315565 is about 68.0815774123.

The spelling of 315565 in words is "three hundred fifteen thousand, five hundred sixty-five".