51000051 has 16 divisors (see below), whose sum is σ = 72720288. Its totient is φ = 31680000.

The previous prime is 51000049. The next prime is 51000071. The reversal of 51000051 is 15000015.

51000051 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 51000051 - 2¹ = 51000049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51000041) 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 15 ways as a sum of consecutive naturals, for example, 201 + ... + 10101.

It is an arithmetic number, because the mean of its divisors is an integer number (4545018).

Almost surely, 2^51000051 is an apocalyptic number.

51000051 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51000051 is a deficient number, since it is larger than the sum of its proper divisors (21720237).

51000051 is a wasteful number, since it uses less digits than its factorization.

51000051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10022.

The product of its (nonzero) digits is 25, while the sum is 12.

The square root of 51000051 is about 7141.4319992562. The cubic root of 51000051 is about 370.8431005409.

Adding to 51000051 its reverse (15000015), we get a palindrome (66000066).

It can be divided in two parts, 510000 and 51, that multiplied together give a square (26010000 = 5100²).

The spelling of 51000051 in words is "fifty-one million, fifty-one", and thus it is an aban number and an uban number.