51216124 has 12 divisors (see below), whose sum is σ = 93525264. Its totient is φ = 24494624.

The previous prime is 51216119. The next prime is 51216127. The reversal of 51216124 is 42161215.

It is a junction number, because it is equal to n+sod(n) for n = 51216095 and 51216104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51216127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278257 + ... + 278440.

It is an arithmetic number, because the mean of its divisors is an integer number (7793772).

Almost surely, 2^51216124 is an apocalyptic number.

It is an amenable number.

51216124 is a deficient number, since it is larger than the sum of its proper divisors (42309140).

51216124 is a wasteful number, since it uses less digits than its factorization.

51216124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556724 (or 556722 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 51216124 is about 7156.5441380599. The cubic root of 51216124 is about 371.3660822741.

Adding to 51216124 its reverse (42161215), we get a palindrome (93377339).

The spelling of 51216124 in words is "fifty-one million, two hundred sixteen thousand, one hundred twenty-four".