51680439 has 6 divisors (see below), whose sum is σ = 74649536. Its totient is φ = 34453620.

The previous prime is 51680429. The next prime is 51680443. The reversal of 51680439 is 93408615.

51680439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51680439 - 2⁸ = 51680183 is a prime.

It is a super-3 number, since 3×51680439³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51680429) 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 5 ways as a sum of consecutive naturals, for example, 2871127 + ... + 2871144.

Almost surely, 2^51680439 is an apocalyptic number.

51680439 is a deficient number, since it is larger than the sum of its proper divisors (22969097).

51680439 is a wasteful number, since it uses less digits than its factorization.

51680439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5742277 (or 5742274 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 51680439 is about 7188.9108354465. The cubic root of 51680439 is about 372.4849511209.

The spelling of 51680439 in words is "fifty-one million, six hundred eighty thousand, four hundred thirty-nine".