51773 has 4 divisors (see below), whose sum is σ = 54048.
Its totient is φ = 49500.
The previous prime is 51769. The next prime is 51787. The reversal of 51773 is 37715.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 51773 - 22 = 51769 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 2251 = 51773 / (5 + 1 + 7 + 7 + 3).
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (51713) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1103 + ... + 1148.
It is an arithmetic number, because the mean of its divisors is an integer number (13512).
251773 is an apocalyptic number.
It is an amenable number.
51773 is a deficient number, since it is larger than the sum of its proper divisors (2275).
51773 is a wasteful number, since it uses less digits than its factorization.
51773 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2274.
The product of its digits is 735, while the sum is 23.
The square root of 51773 is about 227.5368102088.
The cubic root of 51773 is about 37.2707195212.
The spelling of 51773 in words is "fifty-one thousand, seven hundred seventy-three".