231465 has 16 divisors (see below), whose sum is σ = 399168. Its totient is φ = 113856.

The previous prime is 231463. The next prime is 231479. The reversal of 231465 is 564132.

It is a happy number.

It is not a de Polignac number, because 231465 - 2¹ = 231463 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231465.

It is not an unprimeable number, because it can be changed into a prime (231461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399 + ... + 788.

It is an arithmetic number, because the mean of its divisors is an integer number (24948).

2²³¹⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

231465 is a deficient number, since it is larger than the sum of its proper divisors (167703).

231465 is a wasteful number, since it uses less digits than its factorization.

231465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208.

The product of its digits is 720, while the sum is 21.

The square root of 231465 is about 481.1080959618. The cubic root of 231465 is about 61.3990677036.

Adding to 231465 its reverse (564132), we get a palindrome (795597).

It can be divided in two parts, 231 and 465, that added together give a palindrome (696).

The spelling of 231465 in words is "two hundred thirty-one thousand, four hundred sixty-five".