51310212 has 12 divisors (see below), whose sum is σ = 119723856. Its totient is φ = 17103400.

The previous prime is 51310183. The next prime is 51310213. The reversal of 51310212 is 21201315.

51310212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 51310191 and 51310200.

It is not an unprimeable number, because it can be changed into a prime (51310213) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2137914 + ... + 2137937.

It is an arithmetic number, because the mean of its divisors is an integer number (9976988).

Almost surely, 2^51310212 is an apocalyptic number.

It is an amenable number.

51310212 is an abundant number, since it is smaller than the sum of its proper divisors (68413644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51310212 is a wasteful number, since it uses less digits than its factorization.

51310212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275858 (or 4275856 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 51310212 is about 7163.1146856657. The cubic root of 51310212 is about 371.5933526110.

Adding to 51310212 its reverse (21201315), we get a palindrome (72511527).

The spelling of 51310212 in words is "fifty-one million, three hundred ten thousand, two hundred twelve".