51559691 has 8 divisors (see below), whose sum is σ = 54671760. Its totient is φ = 48456448.

The previous prime is 51559679. The next prime is 51559693. The reversal of 51559691 is 19695515.

51559691 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 51559691 - 2¹⁴ = 51543307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51559693) 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, 12800 + ... + 16338.

It is an arithmetic number, because the mean of its divisors is an integer number (6833970).

Almost surely, 2^51559691 is an apocalyptic number.

51559691 is a deficient number, since it is larger than the sum of its proper divisors (3112069).

51559691 is a wasteful number, since it uses less digits than its factorization.

51559691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4413.

The product of its digits is 60750, while the sum is 41.

The square root of 51559691 is about 7180.5077118544. The cubic root of 51559691 is about 372.1946292393.

It can be divided in two parts, 515 and 59691, that added together give a palindrome (60206).

The spelling of 51559691 in words is "fifty-one million, five hundred fifty-nine thousand, six hundred ninety-one".