5231 has 2 divisors, whose sum is σ = 5232.
Its totient is φ = 5230.
The previous prime is 5227. The next prime is 5233. The reversal of 5231 is 1325.
Adding to 5231 its reverse (1325), we get a palindrome (6556).
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 5231 - 22 = 5227 is a prime.
It is a super-2 number, since 2×52312 = 54726722, which contains 22 as substring.
It is a Sophie Germain prime.
Together with 5233, it forms a pair of twin primes.
It is a Chen prime.
It is a plaindrome in base 16.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 5231.
It is not a weakly prime, because it can be changed into another prime (5233) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2615 + 2616.
It is an arithmetic number, because the mean of its divisors is an integer number (2616).
25231 is an apocalyptic number.
5231 is a deficient number, since it is larger than the sum of its proper divisors (1).
5231 is an equidigital number, since it uses as much as digits as its factorization.
5231 is an evil number, because the sum of its binary digits is even.
The product of its digits is 30, while the sum is 11.
The square root of 5231 is about 72.3256524340.
The cubic root of 5231 is about 17.3591413706.
The spelling of 5231 in words is "five thousand, two hundred thirty-one".