51730145 has 8 divisors (see below), whose sum is σ = 62172456. Its totient is φ = 41319936.

The previous prime is 51730139. The next prime is 51730153. The reversal of 51730145 is 54103715.

51730145 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 478864 + 51251281 = 692^2 + 7159^2 .

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 51730145 - 2¹² = 51726049 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, 4322 + ... + 11051.

It is an arithmetic number, because the mean of its divisors is an integer number (7771557).

Almost surely, 2^51730145 is an apocalyptic number.

It is an amenable number.

51730145 is a deficient number, since it is larger than the sum of its proper divisors (10442311).

51730145 is a wasteful number, since it uses less digits than its factorization.

51730145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16051.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 51730145 is about 7192.3671346783. The cubic root of 51730145 is about 372.6043309399.

The spelling of 51730145 in words is "fifty-one million, seven hundred thirty thousand, one hundred forty-five".