51105563 has 4 divisors (see below), whose sum is σ = 53327568. Its totient is φ = 48883560.

The previous prime is 51105559. The next prime is 51105581. The reversal of 51105563 is 36550115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51105563 - 2² = 51105559 is a prime.

It is a super-2 number, since 2×51105563² = 5223557139093938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51105533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110968 + ... + 1111013.

It is an arithmetic number, because the mean of its divisors is an integer number (13331892).

Almost surely, 2^51105563 is an apocalyptic number.

51105563 is a deficient number, since it is larger than the sum of its proper divisors (2222005).

51105563 is a wasteful number, since it uses less digits than its factorization.

51105563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222004.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 51105563 is about 7148.8154962903. The cubic root of 51105563 is about 371.0986652818.

Adding to 51105563 its reverse (36550115), we get a palindrome (87655678).

The spelling of 51105563 in words is "fifty-one million, one hundred five thousand, five hundred sixty-three".