51218030 has 16 divisors (see below), whose sum is σ = 92664000. Its totient is φ = 20382432.

The previous prime is 51218029. The next prime is 51218081. The reversal of 51218030 is 3081215.

51218030 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51217993 and 51218011.

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, 11030 + ... + 14969.

It is an arithmetic number, because the mean of its divisors is an integer number (5791500).

Almost surely, 2^51218030 is an apocalyptic number.

51218030 is a deficient number, since it is larger than the sum of its proper divisors (41445970).

51218030 is a wasteful number, since it uses less digits than its factorization.

51218030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26203.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 51218030 is about 7156.6773016533. The cubic root of 51218030 is about 371.3706889937.

Adding to 51218030 its reverse (3081215), we get a palindrome (54299245).

The spelling of 51218030 in words is "fifty-one million, two hundred eighteen thousand, thirty".