51680043 has 6 divisors (see below), whose sum is σ = 74648964. Its totient is φ = 34453356.

The previous prime is 51680003. The next prime is 51680053. The reversal of 51680043 is 34008615.

It is not a de Polignac number, because 51680043 - 2²⁰ = 50631467 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51679989 and 51680016.

It is not an unprimeable number, because it can be changed into a prime (51680003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2871105 + ... + 2871122.

It is an arithmetic number, because the mean of its divisors is an integer number (12441494).

Almost surely, 2^51680043 is an apocalyptic number.

51680043 is a deficient number, since it is larger than the sum of its proper divisors (22968921).

51680043 is a wasteful number, since it uses less digits than its factorization.

51680043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5742233 (or 5742230 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 51680043 is about 7188.8832929740. The cubic root of 51680043 is about 372.4839997331.

Adding to 51680043 its reverse (34008615), we get a palindrome (85688658).

The spelling of 51680043 in words is "fifty-one million, six hundred eighty thousand, forty-three".