231115 has 8 divisors (see below), whose sum is σ = 293760. Its totient is φ = 173952.

The previous prime is 231109. The next prime is 231131. The reversal of 231115 is 511132.

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

It is a cyclic number.

It is not a de Polignac number, because 231115 - 2³ = 231107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231095 and 231104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275 + ... + 1444.

It is an arithmetic number, because the mean of its divisors is an integer number (36720).

2²³¹¹¹⁵ is an apocalyptic number.

231115 is a deficient number, since it is larger than the sum of its proper divisors (62645).

231115 is a wasteful number, since it uses less digits than its factorization.

231115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741.

The product of its digits is 30, while the sum is 13.

The square root of 231115 is about 480.7442147338. The cubic root of 231115 is about 61.3681047584.

Adding to 231115 its reverse (511132), we get a palindrome (742247).

It can be divided in two parts, 231 and 115, that multiplied together give a triangular number (26565 = T₂₃₀).

The spelling of 231115 in words is "two hundred thirty-one thousand, one hundred fifteen".