3231 has 6 divisors (see below), whose sum is σ = 4680.
Its totient is φ = 2148.
The previous prime is 3229. The next prime is 3251. The reversal of 3231 is 1323.
Adding to 3231 its product of digits (18), we get a square (3249 = 572).
Adding to 3231 its reverse (1323), we get a palindrome (4554).
It can be divided in two parts, 323 and 1, that added together give a square (324 = 182).
It is a happy number.
It is not a de Polignac number, because 3231 - 21 = 3229 is a prime.
It is a super-2 number, since 2×32312 = 20878722, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 359 = 3231 / (3 + 2 + 3 + 1).
It is a plaindrome in base 11 and base 14.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3221) 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, 171 + ... + 188.
It is an arithmetic number, because the mean of its divisors is an integer number (780).
23231 is an apocalyptic number.
3231 is a deficient number, since it is larger than the sum of its proper divisors (1449).
3231 is a wasteful number, since it uses less digits than its factorization.
3231 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 365 (or 362 counting only the distinct ones).
The product of its digits is 18, while the sum is 9.
The square root of 3231 is about 56.8418859645.
The cubic root of 3231 is about 14.7835585619.
The spelling of 3231 in words is "three thousand, two hundred thirty-one".