52991 has 4 divisors (see below), whose sum is σ = 55800.
Its totient is φ = 50184.
The previous prime is 52981. The next prime is 52999. The reversal of 52991 is 19925.
It is a happy number.
52991 is nontrivially palindromic in base 14.
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 52991 - 214 = 36607 is a prime.
It is a Duffinian number.
It is a plaindrome in base 12 and base 16.
It is a self number, because there is not a number n which added to its sum of digits gives 52991.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (52999) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376 + ... + 1413.
It is an arithmetic number, because the mean of its divisors is an integer number (13950).
252991 is an apocalyptic number.
52991 is a deficient number, since it is larger than the sum of its proper divisors (2809).
52991 is a wasteful number, since it uses less digits than its factorization.
52991 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2808.
The product of its digits is 810, while the sum is 26.
The square root of 52991 is about 230.1977410836.
The cubic root of 52991 is about 37.5607312224.
The spelling of 52991 in words is "fifty-two thousand, nine hundred ninety-one".