51192805 has 8 divisors (see below), whose sum is σ = 62929944. Its totient is φ = 39955200.

The previous prime is 51192803. The next prime is 51192829. The reversal of 51192805 is 50829115.

51192805 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 1151329 + 50041476 = 1073^2 + 7074^2 .

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

It is not a de Polignac number, because 51192805 - 2¹ = 51192803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51192803) by changing a digit.

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, 124656 + ... + 125065.

It is an arithmetic number, because the mean of its divisors is an integer number (7866243).

Almost surely, 2^51192805 is an apocalyptic number.

It is an amenable number.

51192805 is a deficient number, since it is larger than the sum of its proper divisors (11737139).

51192805 is a wasteful number, since it uses less digits than its factorization.

51192805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249767.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 51192805 is about 7154.9147444257. The cubic root of 51192805 is about 371.3097120035.

The spelling of 51192805 in words is "fifty-one million, one hundred ninety-two thousand, eight hundred five".