231798 has 16 divisors (see below), whose sum is σ = 529920. Its totient is φ = 66216.

The previous prime is 231779. The next prime is 231799. The reversal of 231798 is 897132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231799) by changing a digit.

231798 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, 2718 + ... + 2801.

It is an arithmetic number, because the mean of its divisors is an integer number (33120).

2²³¹⁷⁹⁸ is an apocalyptic number.

231798 is an abundant number, since it is smaller than the sum of its proper divisors (298122).

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

231798 is a wasteful number, since it uses less digits than its factorization.

231798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531.

The product of its digits is 3024, while the sum is 30.

The square root of 231798 is about 481.4540476515. The cubic root of 231798 is about 61.4284977722.

It can be divided in two parts, 2317 and 98, that added together give a triangular number (2415 = T₆₉).

The spelling of 231798 in words is "two hundred thirty-one thousand, seven hundred ninety-eight".