16231 has 2 divisors, whose sum is σ = 16232.
Its totient is φ = 16230.
The previous prime is 16229. The next prime is 16249. The reversal of 16231 is 13261.
Adding to 16231 its reverse (13261), we get a palindrome (29492).
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 16231 - 21 = 16229 is a prime.
It is a super-2 number, since 2×162312 = 526890722, which contains 22 as substring.
Together with 16229, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (16631) 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 as a sum of consecutive naturals, namely, 8115 + 8116.
It is an arithmetic number, because the mean of its divisors is an integer number (8116).
216231 is an apocalyptic number.
16231 is a deficient number, since it is larger than the sum of its proper divisors (1).
16231 is an equidigital number, since it uses as much as digits as its factorization.
16231 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 36, while the sum is 13.
The square root of 16231 is about 127.4009419117.
The cubic root of 16231 is about 25.3191094360.
The spelling of 16231 in words is "sixteen thousand, two hundred thirty-one".