231597 has 6 divisors (see below), whose sum is σ = 334542. Its totient is φ = 154392.
The previous prime is 231589. The next prime is 231599. The reversal of 231597 is 795132.
231597 is digitally balanced in base 2, 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 only one way, i.e., 145161 + 86436 = 381^2 + 294^2 .
It is not a de Polignac number, because 231597 - 23 = 231589 is a prime.
It is a plaindrome in base 16.
It is a self number, because there is not a number n which added to its sum of digits gives 231597.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (231599) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12858 + ... + 12875.
It is an arithmetic number, because the mean of its divisors is an integer number (55757).
2231597 is an apocalyptic number.
It is an amenable number.
231597 is a deficient number, since it is larger than the sum of its proper divisors (102945).
231597 is a wasteful number, since it uses less digits than its factorization.
231597 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 25739 (or 25736 counting only the distinct ones).
The product of its digits is 1890, while the sum is 27.
The square root of 231597 is about 481.2452597169. The cubic root of 231597 is about 61.4107370514.
It can be divided in two parts, 231 and 597, that added together give a palindrome (828).
The spelling of 231597 in words is "two hundred thirty-one thousand, five hundred ninety-seven".
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