51340563 has 12 divisors (see below), whose sum is σ = 75053160. Its totient is φ = 33814176.

The previous prime is 51340537. The next prime is 51340567. The reversal of 51340563 is 36504315.

51340563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51340563 - 2²⁰ = 50291987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51340567) 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 11 ways as a sum of consecutive naturals, for example, 33618 + ... + 35111.

It is an arithmetic number, because the mean of its divisors is an integer number (6254430).

Almost surely, 2^51340563 is an apocalyptic number.

51340563 is a deficient number, since it is larger than the sum of its proper divisors (23712597).

51340563 is a wasteful number, since it uses less digits than its factorization.

51340563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68818 (or 68815 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 51340563 is about 7165.2329341062. The cubic root of 51340563 is about 371.6666064291. Note that the first 4 decimals are identical.

Adding to 51340563 its reverse (36504315), we get a palindrome (87844878).

The spelling of 51340563 in words is "fifty-one million, three hundred forty thousand, five hundred sixty-three".