231647 has 8 divisors (see below), whose sum is σ = 253344. Its totient is φ = 210528.

The previous prime is 231643. The next prime is 231661. The reversal of 231647 is 746132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231647 - 2² = 231643 is a prime.

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 (231643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (31668).

2²³¹⁶⁴⁷ is an apocalyptic number.

231647 is a deficient number, since it is larger than the sum of its proper divisors (21697).

231647 is a wasteful number, since it uses less digits than its factorization.

231647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289.

The product of its digits is 1008, while the sum is 23.

The square root of 231647 is about 481.2972054770. The cubic root of 231647 is about 61.4151561011.

Adding to 231647 its reverse (746132), we get a palindrome (977779).

It can be divided in two parts, 231 and 647, that added together give a palindrome (878).

The spelling of 231647 in words is "two hundred thirty-one thousand, six hundred forty-seven".