51000243 has 16 divisors (see below), whose sum is σ = 77822976. Its totient is φ = 29102400.

The previous prime is 51000233. The next prime is 51000343. The reversal of 51000243 is 34200015.

51000243 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 51000243 - 2⁵ = 51000211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51000203) 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, 20518 + ... + 22868.

It is an arithmetic number, because the mean of its divisors is an integer number (4863936).

Almost surely, 2^51000243 is an apocalyptic number.

51000243 is a deficient number, since it is larger than the sum of its proper divisors (26822733).

51000243 is a wasteful number, since it uses less digits than its factorization.

51000243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51000243 is about 7141.4454419256. The cubic root of 51000243 is about 370.8435659116.

Adding to 51000243 its reverse (34200015), we get a palindrome (85200258).

The spelling of 51000243 in words is "fifty-one million, two hundred forty-three", and thus it is an aban number.