231712 has 24 divisors (see below), whose sum is σ = 492156. Its totient is φ = 106752.

The previous prime is 231709. The next prime is 231719. The reversal of 231712 is 217132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 190096 + 41616 = 436^2 + 204^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (231719) 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, 138 + ... + 694.

2²³¹⁷¹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246078).

231712 is an abundant number, since it is smaller than the sum of its proper divisors (260444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231712 is a wasteful number, since it uses less digits than its factorization.

231712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 572 counting only the distinct ones).

The product of its digits is 84, while the sum is 16.

The square root of 231712 is about 481.3647265847. The cubic root of 231712 is about 61.4208999150.

Adding to 231712 its reverse (217132), we get a palindrome (448844).

The spelling of 231712 in words is "two hundred thirty-one thousand, seven hundred twelve".