231740 has 12 divisors (see below), whose sum is σ = 486696. Its totient is φ = 92688.

The previous prime is 231719. The next prime is 231779. The reversal of 231740 is 47132.

It is a happy number.

231740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent 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, 5774 + ... + 5813.

It is an arithmetic number, because the mean of its divisors is an integer number (40558).

2²³¹⁷⁴⁰ is an apocalyptic number.

231740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231740 is an abundant number, since it is smaller than the sum of its proper divisors (254956).

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

231740 is a wasteful number, since it uses less digits than its factorization.

231740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11596 (or 11594 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 231740 is about 481.3938096818. The cubic root of 231740 is about 61.4233738423.

Adding to 231740 its reverse (47132), we get a palindrome (278872).

The spelling of 231740 in words is "two hundred thirty-one thousand, seven hundred forty".