231215 has 8 divisors (see below), whose sum is σ = 280368. Its totient is φ = 183040.

The previous prime is 231197. The next prime is 231223. The reversal of 231215 is 512132.

It is a happy number.

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

It is not a de Polignac number, because 231215 - 2⁸ = 230959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479 + ... + 831.

It is an arithmetic number, because the mean of its divisors is an integer number (35046).

2²³¹²¹⁵ is an apocalyptic number.

231215 is a deficient number, since it is larger than the sum of its proper divisors (49153).

231215 is a wasteful number, since it uses less digits than its factorization.

231215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489.

The product of its digits is 60, while the sum is 14.

The square root of 231215 is about 480.8482088976. The cubic root of 231215 is about 61.3769545021.

Adding to 231215 its reverse (512132), we get a palindrome (743347).

The spelling of 231215 in words is "two hundred thirty-one thousand, two hundred fifteen".