7331 has 2 divisors, whose sum is σ = 7332. Its totient is φ = 7330.
The previous prime is 7321. The next prime is 7333. The reversal of 7331 is 1337.
It is a happy number.
7331 is nontrivially palindromic in base 6.
It is a strong prime.
7331 is a truncatable prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-7331 is a prime.
It is a super-2 number, since 2×73312 = 107487122, which contains 22 as substring.
Together with 7333, it forms a pair of twin primes.
It is a Chen prime.
7331 is an undulating number in base 6.
It is a plaindrome in base 13 and base 15.
It is a nialpdrome in base 10.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 7331.
It is not a weakly prime, because it can be changed into another prime (7333) 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 as a sum of consecutive naturals, namely, 3665 + 3666.
It is an arithmetic number, because the mean of its divisors is an integer number (3666).
27331 is an apocalyptic number.
7331 is a deficient number, since it is larger than the sum of its proper divisors (1).
7331 is an equidigital number, since it uses as much as digits as its factorization.
7331 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 63, while the sum is 14.
The square root of 7331 is about 85.6212590424. The cubic root of 7331 is about 19.4261948197.
Adding to 7331 its reverse (1337), we get a palindrome (8668).
The spelling of 7331 in words is "seven thousand, three hundred thirty-one".
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