51263320 has 32 divisors (see below), whose sum is σ = 120359520. Its totient is φ = 19613440.

The previous prime is 51263287. The next prime is 51263321. The reversal of 51263320 is 2336215.

51263320 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 = 51263291 and 51263300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51263321) 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 7 ways as a sum of consecutive naturals, for example, 26941 + ... + 28780.

It is an arithmetic number, because the mean of its divisors is an integer number (3761235).

Almost surely, 2^51263320 is an apocalyptic number.

It is an amenable number.

51263320 is an abundant number, since it is smaller than the sum of its proper divisors (69096200).

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

51263320 is a wasteful number, since it uses less digits than its factorization.

51263320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55755 (or 55751 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 51263320 is about 7159.8407803526. The cubic root of 51263320 is about 371.4801193602.

Adding to 51263320 its reverse (2336215), we get a palindrome (53599535).

The spelling of 51263320 in words is "fifty-one million, two hundred sixty-three thousand, three hundred twenty".