51836647 has 2 divisors, whose sum is σ = 51836648. Its totient is φ = 51836646.

The previous prime is 51836599. The next prime is 51836651. The reversal of 51836647 is 74663815.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51836647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51836677) 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, 25918323 + 25918324.

It is an arithmetic number, because the mean of its divisors is an integer number (25918324).

Almost surely, 2^51836647 is an apocalyptic number.

51836647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51836647 is an equidigital number, since it uses as much as digits as its factorization.

51836647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 51836647 is about 7199.7671490125. The cubic root of 51836647 is about 372.8598615360.

The spelling of 51836647 in words is "fifty-one million, eight hundred thirty-six thousand, six hundred forty-seven".