51559516 has 6 divisors (see below), whose sum is σ = 90229160. Its totient is φ = 25779756.

The previous prime is 51559511. The next prime is 51559531. The reversal of 51559516 is 61595515.

It is a happy number.

51559516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51559511) 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 as a sum of consecutive naturals, namely, 6444936 + ... + 6444943.

Almost surely, 2^51559516 is an apocalyptic number.

It is an amenable number.

51559516 is a deficient number, since it is larger than the sum of its proper divisors (38669644).

51559516 is a wasteful number, since it uses less digits than its factorization.

51559516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12889883 (or 12889881 counting only the distinct ones).

The product of its digits is 33750, while the sum is 37.

The square root of 51559516 is about 7180.4955260762. The cubic root of 51559516 is about 372.1942081472.

It can be divided in two parts, 515 and 59516, that added together give a triangular number (60031 = T₃₄₆).

The spelling of 51559516 in words is "fifty-one million, five hundred fifty-nine thousand, five hundred sixteen".