231400 has 48 divisors (see below), whose sum is σ = 585900. Its totient is φ = 84480.

The previous prime is 231379. The next prime is 231409. The reversal of 231400 is 4132.

231400 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 17956 + 213444 = 134^2 + 462^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (231409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2556 + ... + 2644.

2²³¹⁴⁰⁰ is an apocalyptic number.

231400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292950).

231400 is an abundant number, since it is smaller than the sum of its proper divisors (354500).

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

231400 is a wasteful number, since it uses less digits than its factorization.

231400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 231400 is about 481.0405388322. The cubic root of 231400 is about 61.3933198036.

Adding to 231400 its reverse (4132), we get a palindrome (235532).

The spelling of 231400 in words is "two hundred thirty-one thousand, four hundred".