51199 has 2 divisors, whose sum is σ = 51200. Its totient is φ = 51198.

The previous prime is 51197. The next prime is 51203. The reversal of 51199 is 99115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51199 - 2¹ = 51197 is a prime.

Together with 51197, it forms a pair of twin primes.

It is an Ulam number.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51193) 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 as a sum of consecutive naturals, namely, 25599 + 25600.

It is an arithmetic number, because the mean of its divisors is an integer number (25600).

2⁵¹¹⁹⁹ is an apocalyptic number.

51199 is a deficient number, since it is larger than the sum of its proper divisors (1).

51199 is an equidigital number, since it uses as much as digits as its factorization.

51199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 405, while the sum is 25.

The square root of 51199 is about 226.2719602602. The cubic root of 51199 is about 37.1324689179.

It can be divided in two parts, 5 and 1199, that multiplied together give a palindrome (5995).

The spelling of 51199 in words is "fifty-one thousand, one hundred ninety-nine".