51680630 has 16 divisors (see below), whose sum is σ = 93985920. Its totient is φ = 20458752.

The previous prime is 51680599. The next prime is 51680633. The reversal of 51680630 is 3608615.

51680630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51680593 and 51680602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51680633) 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, 25670 + ... + 27609.

It is an arithmetic number, because the mean of its divisors is an integer number (5874120).

Almost surely, 2^51680630 is an apocalyptic number.

51680630 is a deficient number, since it is larger than the sum of its proper divisors (42305290).

51680630 is a wasteful number, since it uses less digits than its factorization.

51680630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53383.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 51680630 is about 7188.9241197832. The cubic root of 51680630 is about 372.4854099956.

The spelling of 51680630 in words is "fifty-one million, six hundred eighty thousand, six hundred thirty".