31163 has 4 divisors (see below), whose sum is σ = 34008. Its totient is φ = 28320.
The previous prime is 31159. The next prime is 31177. The reversal of 31163 is 36113.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 31163 - 22 = 31159 is a prime.
It is a super-2 number, since 2×311632 = 1942265138, which contains 22 as substring.
It is a Duffinian number.
It is a plaindrome in base 16.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31163.
It is not an unprimeable number, because it can be changed into a prime (31123) 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 in 3 ways as a sum of consecutive naturals, for example, 1406 + ... + 1427.
It is an arithmetic number, because the mean of its divisors is an integer number (8502).
231163 is an apocalyptic number.
31163 is a deficient number, since it is larger than the sum of its proper divisors (2845).
31163 is a wasteful number, since it uses less digits than its factorization.
31163 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2844.
The product of its digits is 54, while the sum is 14.
The square root of 31163 is about 176.5304506310. The cubic root of 31163 is about 31.4687689114.
Adding to 31163 its reverse (36113), we get a palindrome (67276).
Subtracting 31163 from its reverse (36113), we obtain a triangular number (4950 = T99).
The spelling of 31163 in words is "thirty-one thousand, one hundred sixty-three".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.186 sec. • engine limits •