51040145 has 16 divisors (see below), whose sum is σ = 68236560. Its totient is φ = 36390144.

The previous prime is 51040141. The next prime is 51040153. The reversal of 51040145 is 54104015.

51040145 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 8 ways, for example, as 246016 + 50794129 = 496^2 + 7127^2 .

It is a cyclic number.

It is not a de Polignac number, because 51040145 - 2² = 51040141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51040141) 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 15 ways as a sum of consecutive naturals, for example, 11654 + ... + 15423.

It is an arithmetic number, because the mean of its divisors is an integer number (4264785).

Almost surely, 2^51040145 is an apocalyptic number.

It is an amenable number.

51040145 is a deficient number, since it is larger than the sum of its proper divisors (17196415).

51040145 is a wasteful number, since it uses less digits than its factorization.

51040145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27124.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 51040145 is about 7144.2385878413. The cubic root of 51040145 is about 370.9402552714.

The spelling of 51040145 in words is "fifty-one million, forty thousand, one hundred forty-five".