51335478 has 32 divisors (see below), whose sum is σ = 120791520. Its totient is φ = 16104960.

The previous prime is 51335447. The next prime is 51335503. The reversal of 51335478 is 87453315.

51335478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27043 + ... + 28878.

It is an arithmetic number, because the mean of its divisors is an integer number (3774735).

Almost surely, 2^51335478 is an apocalyptic number.

51335478 is an abundant number, since it is smaller than the sum of its proper divisors (69456042).

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

51335478 is a wasteful number, since it uses less digits than its factorization.

51335478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55949 (or 55943 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 51335478 is about 7164.8780868902. The cubic root of 51335478 is about 371.6543355138.

The spelling of 51335478 in words is "fifty-one million, three hundred thirty-five thousand, four hundred seventy-eight".