51982 has 16 divisors (see below), whose sum is σ = 92160. Its totient is φ = 21528.

The previous prime is 51977. The next prime is 51991. The reversal of 51982 is 28915.

51982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619 + ... + 697.

It is an arithmetic number, because the mean of its divisors is an integer number (5760).

2⁵¹⁹⁸² is an apocalyptic number.

51982 is a deficient number, since it is larger than the sum of its proper divisors (40178).

51982 is a wasteful number, since it uses less digits than its factorization.

51982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135.

The product of its digits is 720, while the sum is 25.

The square root of 51982 is about 227.9956139929. The cubic root of 51982 is about 37.3208043275.

The spelling of 51982 in words is "fifty-one thousand, nine hundred eighty-two".