51395513 has 16 divisors (see below), whose sum is σ = 58564800. Its totient is φ = 44712000.

The previous prime is 51395497. The next prime is 51395521. The reversal of 51395513 is 31559315.

It is a happy number.

51395513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51395513 - 2⁴ = 51395497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51395513.

It is not an unprimeable number, because it can be changed into a prime (51395543) 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, 61583 + ... + 62411.

It is an arithmetic number, because the mean of its divisors is an integer number (3660300).

Almost surely, 2^51395513 is an apocalyptic number.

It is an amenable number.

51395513 is a deficient number, since it is larger than the sum of its proper divisors (7169287).

51395513 is a wasteful number, since it uses less digits than its factorization.

51395513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112.

The product of its digits is 10125, while the sum is 32.

The square root of 51395513 is about 7169.0663966796. The cubic root of 51395513 is about 371.7991578780.

The spelling of 51395513 in words is "fifty-one million, three hundred ninety-five thousand, five hundred thirteen".