51783 has 8 divisors (see below), whose sum is σ = 70896. Its totient is φ = 33600.

The previous prime is 51769. The next prime is 51787. The reversal of 51783 is 38715.

51783 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51783 - 2⁴ = 51767 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88 + ... + 333.

It is an arithmetic number, because the mean of its divisors is an integer number (8862).

2⁵¹⁷⁸³ is an apocalyptic number.

51783 is a deficient number, since it is larger than the sum of its proper divisors (19113).

51783 is a wasteful number, since it uses less digits than its factorization.

51783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its digits is 840, while the sum is 24.

The square root of 51783 is about 227.5587836143. The cubic root of 51783 is about 37.2731189907.

The spelling of 51783 in words is "fifty-one thousand, seven hundred eighty-three".