51207680 has 80 divisors (see below), whose sum is σ = 124773264. Its totient is φ = 20152320.

The previous prime is 51207671. The next prime is 51207697. The reversal of 51207680 is 8670215.

It is a tau number, because it is divible by the number of its divisors (80).

51207680 is a modest number, since divided by 7680 gives 5120 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212360 + ... + 212600.

Almost surely, 2^51207680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51207680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62386632).

51207680 is an abundant number, since it is smaller than the sum of its proper divisors (73565584).

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

51207680 is an equidigital number, since it uses as much as digits as its factorization.

51207680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 51207680 is about 7155.9541641908. The cubic root of 51207680 is about 371.3456721161.

Adding to 51207680 its reverse (8670215), we get a palindrome (59877895).

The spelling of 51207680 in words is "fifty-one million, two hundred seven thousand, six hundred eighty".