51285918 has 8 divisors (see below), whose sum is σ = 102571848. Its totient is φ = 17095304.

The previous prime is 51285907. The next prime is 51285919. The reversal of 51285918 is 81958215.

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

51285918 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51285919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4273821 + ... + 4273832.

It is an arithmetic number, because the mean of its divisors is an integer number (12821481).

Almost surely, 2^51285918 is an apocalyptic number.

51285918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51285918 is a wasteful number, since it uses less digits than its factorization.

51285918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8547658.

The product of its digits is 28800, while the sum is 39.

The square root of 51285918 is about 7161.4187141934. The cubic root of 51285918 is about 371.5346968795.

The spelling of 51285918 in words is "fifty-one million, two hundred eighty-five thousand, nine hundred eighteen".