231088 has 40 divisors (see below), whose sum is σ = 531216. Its totient is φ = 96000.

The previous prime is 231079. The next prime is 231107. The reversal of 231088 is 880132.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

231088 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 7 ways as a sum of consecutive naturals, for example, 2238 + ... + 2338.

2²³¹⁰⁸⁸ 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 231088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265608).

231088 is an abundant number, since it is smaller than the sum of its proper divisors (300128).

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

231088 is a wasteful number, since it uses less digits than its factorization.

231088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 231088 is about 480.7161324524. The cubic root of 231088 is about 61.3657148899.

It can be divided in two parts, 23 and 1088, that added together give a palindrome (1111).

The spelling of 231088 in words is "two hundred thirty-one thousand, eighty-eight".