51224212 has 24 divisors (see below), whose sum is σ = 96938856. Its totient is φ = 23543808.

The previous prime is 51224207. The next prime is 51224221. The reversal of 51224212 is 21242215.

51224212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6948496 + 44275716 = 2636^2 + 6654^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51224212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11448 + ... + 15280.

It is an arithmetic number, because the mean of its divisors is an integer number (4039119).

Almost surely, 2^51224212 is an apocalyptic number.

51224212 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51224212 is a deficient number, since it is larger than the sum of its proper divisors (45714644).

51224212 is a wasteful number, since it uses less digits than its factorization.

51224212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107 (or 4105 counting only the distinct ones).

The product of its digits is 320, while the sum is 19.

The square root of 51224212 is about 7157.1091929633. The cubic root of 51224212 is about 371.3856298342.

Adding to 51224212 its reverse (21242215), we get a palindrome (72466427).

The spelling of 51224212 in words is "fifty-one million, two hundred twenty-four thousand, two hundred twelve".