231560 has 32 divisors (see below), whose sum is σ = 596160. Its totient is φ = 79296.

The previous prime is 231559. The next prime is 231563. The reversal of 231560 is 65132.

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231560.

It is not an unprimeable number, because it can be changed into a prime (231563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134 + ... + 693.

It is an arithmetic number, because the mean of its divisors is an integer number (18630).

2²³¹⁵⁶⁰ is an apocalyptic number.

231560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231560 is an abundant number, since it is smaller than the sum of its proper divisors (364600).

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

231560 is a wasteful number, since it uses less digits than its factorization.

231560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 231560 is about 481.2068162443. The cubic root of 231560 is about 61.4074665452.

Adding to 231560 its reverse (65132), we get a palindrome (296692).

The spelling of 231560 in words is "two hundred thirty-one thousand, five hundred sixty".