51020289 has 12 divisors (see below), whose sum is σ = 73764756. Its totient is φ = 33981792.

The previous prime is 51020273. The next prime is 51020297. The reversal of 51020289 is 98202015.

It can be written as a sum of positive squares in 2 ways, for example, as 19210689 + 31809600 = 4383^2 + 5640^2 .

It is not a de Polignac number, because 51020289 - 2⁴ = 51020273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51020269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11539 + ... + 15335.

It is an arithmetic number, because the mean of its divisors is an integer number (6147063).

Almost surely, 2^51020289 is an apocalyptic number.

It is an amenable number.

51020289 is a deficient number, since it is larger than the sum of its proper divisors (22744467).

51020289 is a wasteful number, since it uses less digits than its factorization.

51020289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5296 (or 5293 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 51020289 is about 7142.8488014237. The cubic root of 51020289 is about 370.8921470942.

The spelling of 51020289 in words is "fifty-one million, twenty thousand, two hundred eighty-nine".