51023455559 has 4 divisors (see below), whose sum is σ = 51090858504. Its totient is φ = 50956052616.

The previous prime is 51023455547. The next prime is 51023455603. The reversal of 51023455559 is 95555432015.

It is a happy number.

51023455559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95555432015 = 5 ⋅19111086403.

It is a cyclic number.

It is not a de Polignac number, because 51023455559 - 2¹² = 51023451463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51023455519) 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, 33700337 + ... + 33701850.

It is an arithmetic number, because the mean of its divisors is an integer number (12772714626).

Almost surely, 2^51023455559 is an apocalyptic number.

51023455559 is a deficient number, since it is larger than the sum of its proper divisors (67402945).

51023455559 is an equidigital number, since it uses as much as digits as its factorization.

51023455559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67402944.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 51023455559 in words is "fifty-one billion, twenty-three million, four hundred fifty-five thousand, five hundred fifty-nine".