51061563 has 16 divisors (see below), whose sum is σ = 86453760. Its totient is φ = 29177928.

The previous prime is 51061553. The next prime is 51061579. The reversal of 51061563 is 36516015.

It is a happy number.

51061563 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 51061563 - 2⁶ = 51061499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51061553) 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, 134895 + ... + 135272.

It is an arithmetic number, because the mean of its divisors is an integer number (5403360).

Almost surely, 2^51061563 is an apocalyptic number.

51061563 is a deficient number, since it is larger than the sum of its proper divisors (35392197).

51061563 is a wasteful number, since it uses less digits than its factorization.

51061563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270183 (or 270177 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 51061563 is about 7145.7374007166. The cubic root of 51061563 is about 370.9921339599.

Adding to 51061563 its reverse (36516015), we get a palindrome (87577578).

The spelling of 51061563 in words is "fifty-one million, sixty-one thousand, five hundred sixty-three".