51939305 has 16 divisors (see below), whose sum is σ = 69833664. Its totient is φ = 36751680.

The previous prime is 51939299. The next prime is 51939323. The reversal of 51939305 is 50393915.

51939305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51939305 - 2⁸ = 51939049 is a prime.

It is a Duffinian number.

It is a Curzon 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, 10727 + ... + 14796.

It is an arithmetic number, because the mean of its divisors is an integer number (4364604).

Almost surely, 2^51939305 is an apocalyptic number.

51939305 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51939305 is a deficient number, since it is larger than the sum of its proper divisors (17894359).

51939305 is a wasteful number, since it uses less digits than its factorization.

51939305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25576.

The product of its (nonzero) digits is 18225, while the sum is 35.

The square root of 51939305 is about 7206.8928811243. The cubic root of 51939305 is about 373.1058381409.

The spelling of 51939305 in words is "fifty-one million, nine hundred thirty-nine thousand, three hundred five".