Adding to 51222 its reverse (22215), we get a palindrome (73437).
It is a sphenic number, since it is the product of 3 distinct primes.
51222 is an admirable number.
It is a congruent number.
51222 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
251222 is an apocalyptic number.
51222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
51222 is a wasteful number, since it uses less digits than its factorization.
51222 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 8542.
The square root of 51222 is about 226.3227783499. The cubic root of 51222 is about 37.1380283945.
The spelling of 51222 in words is "fifty-one thousand, two hundred twenty-two".