51779 has 8 divisors (see below), whose sum is σ = 63840. Its totient is φ = 40896.

The previous prime is 51769. The next prime is 51787. The reversal of 51779 is 97715.

51779 = 57² + 58² + ... + 69².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51779 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51719) 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 in 7 ways as a sum of consecutive naturals, for example, 194 + ... + 375.

It is an arithmetic number, because the mean of its divisors is an integer number (7980).

2⁵¹⁷⁷⁹ is an apocalyptic number.

51779 is a deficient number, since it is larger than the sum of its proper divisors (12061).

51779 is a wasteful number, since it uses less digits than its factorization.

51779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589.

The product of its digits is 2205, while the sum is 29.

The square root of 51779 is about 227.5499945067. The cubic root of 51779 is about 37.2721592400.

The spelling of 51779 in words is "fifty-one thousand, seven hundred seventy-nine".