231996 has 12 divisors (see below), whose sum is σ = 541352. Its totient is φ = 77328.

The previous prime is 231967. The next prime is 232003. The reversal of 231996 is 699132.

231996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a d-powerful number, because it can be written as 2¹³ + 3¹⁰ + 9⁵ + 1 + 9⁵ + 6⁶ .

It is a congruent number.

It is an unprimeable number.

231996 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9655 + ... + 9678.

2²³¹⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

231996 is an abundant number, since it is smaller than the sum of its proper divisors (309356).

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

231996 is a wasteful number, since it uses less digits than its factorization.

231996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19340 (or 19338 counting only the distinct ones).

The product of its digits is 2916, while the sum is 30.

The square root of 231996 is about 481.6596308598. The cubic root of 231996 is about 61.4459833718.

It can be divided in two parts, 2319 and 96, that added together give a triangular number (2415 = T₆₉).

The spelling of 231996 in words is "two hundred thirty-one thousand, nine hundred ninety-six".