231315 has 16 divisors (see below), whose sum is σ = 423168. Its totient is φ = 105696.

The previous prime is 231299. The next prime is 231317. The reversal of 231315 is 513132.

It is a happy number.

It is not a de Polignac number, because 231315 - 2⁴ = 231299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 231294 and 231303.

It is not an unprimeable number, because it can be changed into a prime (231317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 997 + ... + 1206.

It is an arithmetic number, because the mean of its divisors is an integer number (26448).

2²³¹³¹⁵ is an apocalyptic number.

231315 is a deficient number, since it is larger than the sum of its proper divisors (191853).

231315 is a wasteful number, since it uses less digits than its factorization.

231315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218.

The product of its digits is 90, while the sum is 15.

The square root of 231315 is about 480.9521805752. The cubic root of 231315 is about 61.3858016946.

Adding to 231315 its reverse (513132), we get a palindrome (744447).

The spelling of 231315 in words is "two hundred thirty-one thousand, three hundred fifteen".