51224 has 16 divisors (see below), whose sum is σ = 101400. Its totient is φ = 24192.

The previous prime is 51217. The next prime is 51229. The reversal of 51224 is 42215.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 51199 and 51208.

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 (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 320.

2⁵¹²²⁴ is an apocalyptic number.

It is an amenable number.

51224 is a deficient number, since it is larger than the sum of its proper divisors (50176).

51224 is a wasteful number, since it uses less digits than its factorization.

51224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 358 counting only the distinct ones).

The product of its digits is 80, while the sum is 14.

The square root of 51224 is about 226.3271967749. The cubic root of 51224 is about 37.1385117486.

Adding to 51224 its reverse (42215), we get a palindrome (93439).

Subtracting from 51224 its reverse (42215), we obtain a palindrome (9009).

The spelling of 51224 in words is "fifty-one thousand, two hundred twenty-four".