231986 has 8 divisors (see below), whose sum is σ = 350364. Its totient is φ = 115200.

The previous prime is 231967. The next prime is 232003. The reversal of 231986 is 689132.

It can be written as a sum of positive squares in 2 ways, for example, as 231361 + 625 = 481^2 + 25^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86 + ... + 686.

2²³¹⁹⁸⁶ is an apocalyptic number.

231986 is a deficient number, since it is larger than the sum of its proper divisors (118378).

231986 is a wasteful number, since it uses less digits than its factorization.

231986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796.

The product of its digits is 2592, while the sum is 29.

The square root of 231986 is about 481.6492499735. The cubic root of 231986 is about 61.4451004993.

The spelling of 231986 in words is "two hundred thirty-one thousand, nine hundred eighty-six".