51302389 has 2 divisors, whose sum is σ = 51302390. Its totient is φ = 51302388.

The previous prime is 51302371. The next prime is 51302411. The reversal of 51302389 is 98320315.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50268100 + 1034289 = 7090^2 + 1017^2 .

It is a cyclic number.

It is not a de Polignac number, because 51302389 - 2¹¹ = 51300341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51302389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51302309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25651194 + 25651195.

It is an arithmetic number, because the mean of its divisors is an integer number (25651195).

Almost surely, 2^51302389 is an apocalyptic number.

It is an amenable number.

51302389 is a deficient number, since it is larger than the sum of its proper divisors (1).

51302389 is an equidigital number, since it uses as much as digits as its factorization.

51302389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 51302389 is about 7162.5686035109. The cubic root of 51302389 is about 371.5744666853.

The spelling of 51302389 in words is "fifty-one million, three hundred two thousand, three hundred eighty-nine".