51678485 has 4 divisors (see below), whose sum is σ = 62014188. Its totient is φ = 41342784.

The previous prime is 51678481. The next prime is 51678503. The reversal of 51678485 is 58487615.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7349521 + 44328964 = 2711^2 + 6658^2 .

It is a cyclic number.

It is not a de Polignac number, because 51678485 - 2² = 51678481 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51678481) by changing a digit.

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, 5167844 + ... + 5167853.

It is an arithmetic number, because the mean of its divisors is an integer number (15503547).

Almost surely, 2^51678485 is an apocalyptic number.

It is an amenable number.

51678485 is a deficient number, since it is larger than the sum of its proper divisors (10335703).

51678485 is a wasteful number, since it uses less digits than its factorization.

51678485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10335702.

The product of its digits is 268800, while the sum is 44.

The square root of 51678485 is about 7188.7749304036. The cubic root of 51678485 is about 372.4802565996.

The spelling of 51678485 in words is "fifty-one million, six hundred seventy-eight thousand, four hundred eighty-five".