231608 has 32 divisors (see below), whose sum is σ = 498960. Its totient is φ = 99840.

The previous prime is 231607. The next prime is 231611. The reversal of 231608 is 806132.

It is a self number, because there is not a number n which added to its sum of digits gives 231608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1703 + ... + 1833.

2²³¹⁶⁰⁸ 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 231608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249480).

231608 is an abundant number, since it is smaller than the sum of its proper divisors (267352).

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

231608 is a wasteful number, since it uses less digits than its factorization.

231608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 231608 is about 481.2566882652. The cubic root of 231608 is about 61.4117092969.

The spelling of 231608 in words is "two hundred thirty-one thousand, six hundred eight".