31193 has 2 divisors, whose sum is σ = 31194. Its totient is φ = 31192.
The previous prime is 31189. The next prime is 31219. The reversal of 31193 is 39113.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 26569 + 4624 = 163^2 + 68^2 .
31193 is a truncatable prime.
It is an emirp because it is prime and its reverse (39113) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 31193 - 22 = 31189 is a prime.
It is a nialpdrome in base 14.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31193.
It is not a weakly prime, because it can be changed into another prime (31123) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15596 + 15597.
It is an arithmetic number, because the mean of its divisors is an integer number (15597).
231193 is an apocalyptic number.
It is an amenable number.
31193 is a deficient number, since it is larger than the sum of its proper divisors (1).
31193 is an equidigital number, since it uses as much as digits as its factorization.
31193 is an evil number, because the sum of its binary digits is even.
The product of its digits is 81, while the sum is 17.
The square root of 31193 is about 176.6154013669. The cubic root of 31193 is about 31.4788637919.
It can be divided in two parts, 311 and 93, that added together give a palindrome (404).
The spelling of 31193 in words is "thirty-one thousand, one hundred ninety-three".
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