231630 has 32 divisors (see below), whose sum is σ = 635904. Its totient is φ = 52896.

The previous prime is 231613. The next prime is 231631. The reversal of 231630 is 36132.

231630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342 + ... + 761.

It is an arithmetic number, because the mean of its divisors is an integer number (19872).

2²³¹⁶³⁰ is an apocalyptic number.

231630 is an abundant number, since it is smaller than the sum of its proper divisors (404274).

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

231630 is a wasteful number, since it uses less digits than its factorization.

231630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 231630 is about 481.2795445477. The cubic root of 231630 is about 61.4136536956.

Adding to 231630 its reverse (36132), we get a palindrome (267762).

It can be divided in two parts, 2316 and 30, that added together give a triangular number (2346 = T₆₈).

The spelling of 231630 in words is "two hundred thirty-one thousand, six hundred thirty".