51685546 has 8 divisors (see below), whose sum is σ = 84576384. Its totient is φ = 23493420.

The previous prime is 51685523. The next prime is 51685561. The reversal of 51685546 is 64558615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51685499 and 51685508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1174650 + ... + 1174693.

It is an arithmetic number, because the mean of its divisors is an integer number (10572048).

Almost surely, 2^51685546 is an apocalyptic number.

51685546 is a deficient number, since it is larger than the sum of its proper divisors (32890838).

51685546 is a wasteful number, since it uses less digits than its factorization.

51685546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2349356.

The product of its digits is 144000, while the sum is 40.

The square root of 51685546 is about 7189.2660265148. The cubic root of 51685546 is about 372.4972202246.

The spelling of 51685546 in words is "fifty-one million, six hundred eighty-five thousand, five hundred forty-six".