51463643 has 16 divisors (see below), whose sum is σ = 64513536. Its totient is φ = 39882240.

The previous prime is 51463619. The next prime is 51463649. The reversal of 51463643 is 34636415.

51463643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51463643 - 2⁶ = 51463579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51463649) 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 in 15 ways as a sum of consecutive naturals, for example, 13130 + ... + 16592.

It is an arithmetic number, because the mean of its divisors is an integer number (4032096).

Almost surely, 2^51463643 is an apocalyptic number.

51463643 is a deficient number, since it is larger than the sum of its proper divisors (13049893).

51463643 is a wasteful number, since it uses less digits than its factorization.

51463643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674.

The product of its digits is 25920, while the sum is 32.

The square root of 51463643 is about 7173.8164877560. The cubic root of 51463643 is about 371.9633712538.

The spelling of 51463643 in words is "fifty-one million, four hundred sixty-three thousand, six hundred forty-three".