51284237 has 2 divisors, whose sum is σ = 51284238. Its totient is φ = 51284236.

The previous prime is 51284221. The next prime is 51284239. The reversal of 51284237 is 73248215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39866596 + 11417641 = 6314^2 + 3379^2 .

It is a cyclic number.

It is not a de Polignac number, because 51284237 - 2⁴ = 51284221 is a prime.

Together with 51284239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51284239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25642118 + 25642119.

It is an arithmetic number, because the mean of its divisors is an integer number (25642119).

Almost surely, 2^51284237 is an apocalyptic number.

It is an amenable number.

51284237 is a deficient number, since it is larger than the sum of its proper divisors (1).

51284237 is an equidigital number, since it uses as much as digits as its factorization.

51284237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 32.

The square root of 51284237 is about 7161.3013482188. The cubic root of 51284237 is about 371.5306375674.

The spelling of 51284237 in words is "fifty-one million, two hundred eighty-four thousand, two hundred thirty-seven".