51223 has 4 divisors (see below), whose sum is σ = 51688. Its totient is φ = 50760.

The previous prime is 51217. The next prime is 51229. The reversal of 51223 is 32215.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (51217) and next prime (51229).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51223 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 (51229) 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 3 ways as a sum of consecutive naturals, for example, 40 + ... + 322.

It is an arithmetic number, because the mean of its divisors is an integer number (12922).

2⁵¹²²³ is an apocalyptic number.

51223 is a deficient number, since it is larger than the sum of its proper divisors (465).

51223 is a wasteful number, since it uses less digits than its factorization.

51223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464.

The product of its digits is 60, while the sum is 13.

The square root of 51223 is about 226.3249875732. The cubic root of 51223 is about 37.1382700731.

Adding to 51223 its reverse (32215), we get a palindrome (83438).

It can be divided in two parts, 512 and 23, that added together give a palindrome (535).

The spelling of 51223 in words is "fifty-one thousand, two hundred twenty-three".