51394545 has 24 divisors (see below), whose sum is σ = 89257896. Its totient is φ = 27356928.

The previous prime is 51394543. The next prime is 51394579. The reversal of 51394545 is 54549315.

51394545 is a `hidden beast` number, since 513 + 94 + 54 + 5 = 666.

51394545 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 11553201 + 39841344 = 3399^2 + 6312^2 .

It is not a de Polignac number, because 51394545 - 2¹ = 51394543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51394543) 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 23 ways as a sum of consecutive naturals, for example, 35149 + ... + 36581.

It is an arithmetic number, because the mean of its divisors is an integer number (3719079).

Almost surely, 2^51394545 is an apocalyptic number.

It is an amenable number.

51394545 is a deficient number, since it is larger than the sum of its proper divisors (37863351).

51394545 is a wasteful number, since it uses less digits than its factorization.

51394545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241 (or 2238 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 51394545 is about 7168.9988840842. The cubic root of 51394545 is about 371.7968236675.

The spelling of 51394545 in words is "fifty-one million, three hundred ninety-four thousand, five hundred forty-five".