51330205 has 4 divisors (see below), whose sum is σ = 61596252. Its totient is φ = 41064160.

The previous prime is 51330199. The next prime is 51330247. The reversal of 51330205 is 50203315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35497764 + 15832441 = 5958^2 + 3979^2 .

It is not a de Polignac number, because 51330205 - 2³ = 51330197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5133016 + ... + 5133025.

It is an arithmetic number, because the mean of its divisors is an integer number (15399063).

Almost surely, 2^51330205 is an apocalyptic number.

It is an amenable number.

51330205 is a deficient number, since it is larger than the sum of its proper divisors (10266047).

51330205 is a wasteful number, since it uses less digits than its factorization.

51330205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10266046.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 51330205 is about 7164.5101018841. The cubic root of 51330205 is about 371.6416100688.

The spelling of 51330205 in words is "fifty-one million, three hundred thirty thousand, two hundred five".