51335563 has 8 divisors (see below), whose sum is σ = 56719008. Its totient is φ = 46214784.

The previous prime is 51335551. The next prime is 51335569. The reversal of 51335563 is 36553315.

It is a happy number.

51335563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51335563 - 2²¹ = 49238411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51335569) 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 7 ways as a sum of consecutive naturals, for example, 65256 + ... + 66037.

It is an arithmetic number, because the mean of its divisors is an integer number (7089876).

Almost surely, 2^51335563 is an apocalyptic number.

51335563 is a deficient number, since it is larger than the sum of its proper divisors (5383445).

51335563 is a wasteful number, since it uses less digits than its factorization.

51335563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131333.

The product of its digits is 20250, while the sum is 31.

The square root of 51335563 is about 7164.8840186007. The cubic root of 51335563 is about 371.6545406390.

Adding to 51335563 its reverse (36553315), we get a palindrome (87888878).

The spelling of 51335563 in words is "fifty-one million, three hundred thirty-five thousand, five hundred sixty-three".