51366545 has 8 divisors (see below), whose sum is σ = 63306024. Its totient is φ = 39982464.

The previous prime is 51366529. The next prime is 51366559. The reversal of 51366545 is 54566315.

51366545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1635841 + 49730704 = 1279^2 + 7052^2 .

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 51366545 - 2⁴ = 51366529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 138644 + ... + 139013.

It is an arithmetic number, because the mean of its divisors is an integer number (7913253).

Almost surely, 2^51366545 is an apocalyptic number.

It is an amenable number.

51366545 is a deficient number, since it is larger than the sum of its proper divisors (11939479).

51366545 is a wasteful number, since it uses less digits than its factorization.

51366545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277699.

The product of its digits is 54000, while the sum is 35.

The square root of 51366545 is about 7167.0457651671. The cubic root of 51366545 is about 371.7292924917.

The spelling of 51366545 in words is "fifty-one million, three hundred sixty-six thousand, five hundred forty-five".