51173 has 4 divisors (see below), whose sum is σ = 51948. Its totient is φ = 50400.

The previous prime is 51169. The next prime is 51193. The reversal of 51173 is 37115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37249 + 13924 = 193^2 + 118^2 .

It is a cyclic number.

It is not a de Polignac number, because 51173 - 2² = 51169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51133) 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, 278 + ... + 423.

It is an arithmetic number, because the mean of its divisors is an integer number (12987).

2⁵¹¹⁷³ is an apocalyptic number.

It is an amenable number.

51173 is a deficient number, since it is larger than the sum of its proper divisors (775).

51173 is an equidigital number, since it uses as much as digits as its factorization.

51173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its digits is 105, while the sum is 17.

The square root of 51173 is about 226.2144999773. The cubic root of 51173 is about 37.1261822869.

Adding to 51173 its reverse (37115), we get a palindrome (88288).

It can be divided in two parts, 5117 and 3, that multiplied together give a palindrome (15351).

The spelling of 51173 in words is "fifty-one thousand, one hundred seventy-three".