51534643 has 2 divisors, whose sum is σ = 51534644. Its totient is φ = 51534642.

The previous prime is 51534641. The next prime is 51534713. The reversal of 51534643 is 34643515.

51534643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51534643 - 2¹ = 51534641 is a prime.

Together with 51534641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51534641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25767321 + 25767322.

It is an arithmetic number, because the mean of its divisors is an integer number (25767322).

Almost surely, 2^51534643 is an apocalyptic number.

51534643 is a deficient number, since it is larger than the sum of its proper divisors (1).

51534643 is an equidigital number, since it uses as much as digits as its factorization.

51534643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 31.

The square root of 51534643 is about 7178.7633336112. The cubic root of 51534643 is about 372.1343480327.

The spelling of 51534643 in words is "fifty-one million, five hundred thirty-four thousand, six hundred forty-three".