51340305 has 16 divisors (see below), whose sum is σ = 83695680. Its totient is φ = 26864448.

The previous prime is 51340259. The next prime is 51340319. The reversal of 51340305 is 50304315.

It is not a de Polignac number, because 51340305 - 2⁸ = 51340049 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 31495 + ... + 33084.

It is an arithmetic number, because the mean of its divisors is an integer number (5230980).

Almost surely, 2^51340305 is an apocalyptic number.

It is an amenable number.

51340305 is a deficient number, since it is larger than the sum of its proper divisors (32355375).

51340305 is a wasteful number, since it uses less digits than its factorization.

51340305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64640.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 51340305 is about 7165.2149304818. The cubic root of 51340305 is about 371.6659838535.

The spelling of 51340305 in words is "fifty-one million, three hundred forty thousand, three hundred five".