51000289 has 4 divisors (see below), whose sum is σ = 54000324. Its totient is φ = 48000256.

The previous prime is 51000233. The next prime is 51000343. The reversal of 51000289 is 98200015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98200015 = 5 ⋅19640003.

It can be written as a sum of positive squares in 2 ways, for example, as 22963264 + 28037025 = 4792^2 + 5295^2 .

It is a cyclic number.

It is not a de Polignac number, because 51000289 - 2¹⁹ = 50476001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51001289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1499992 + ... + 1500025.

It is an arithmetic number, because the mean of its divisors is an integer number (13500081).

Almost surely, 2^51000289 is an apocalyptic number.

It is an amenable number.

51000289 is a deficient number, since it is larger than the sum of its proper divisors (3000035).

51000289 is a wasteful number, since it uses less digits than its factorization.

51000289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000034.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 51000289 is about 7141.4486625614. The cubic root of 51000289 is about 370.8436774065.

The spelling of 51000289 in words is "fifty-one million, two hundred eighty-nine", and thus it is an aban number.