51335905 has 8 divisors (see below), whose sum is σ = 61717032. Its totient is φ = 40992768.

The previous prime is 51335899. The next prime is 51335927. The reversal of 51335905 is 50953315.

51335905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 627264 + 50708641 = 792^2 + 7121^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51335905 - 2⁵ = 51335873 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 6432 + ... + 12001.

It is an arithmetic number, because the mean of its divisors is an integer number (7714629).

Almost surely, 2^51335905 is an apocalyptic number.

It is an amenable number.

51335905 is a deficient number, since it is larger than the sum of its proper divisors (10381127).

51335905 is a wasteful number, since it uses less digits than its factorization.

51335905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18995.

The product of its (nonzero) digits is 10125, while the sum is 31.

The square root of 51335905 is about 7164.9078849627. The cubic root of 51335905 is about 371.6553659640.

The spelling of 51335905 in words is "fifty-one million, three hundred thirty-five thousand, nine hundred five".