51800851 has 4 divisors (see below), whose sum is σ = 53200912. Its totient is φ = 50400792.

The previous prime is 51800839. The next prime is 51800867. The reversal of 51800851 is 15800815.

51800851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51800851 - 2¹⁵ = 51768083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51800951) 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 3 ways as a sum of consecutive naturals, for example, 699975 + ... + 700048.

It is an arithmetic number, because the mean of its divisors is an integer number (13300228).

Almost surely, 2^51800851 is an apocalyptic number.

51800851 is a deficient number, since it is larger than the sum of its proper divisors (1400061).

51800851 is a wasteful number, since it uses less digits than its factorization.

51800851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400060.

The product of its (nonzero) digits is 1600, while the sum is 28.

The square root of 51800851 is about 7197.2808059711. The cubic root of 51800851 is about 372.7740151590.

The spelling of 51800851 in words is "fifty-one million, eight hundred thousand, eight hundred fifty-one".