51318115 has 4 divisors (see below), whose sum is σ = 61581744. Its totient is φ = 41054488.

The previous prime is 51318103. The next prime is 51318143. The reversal of 51318115 is 51181315.

51318115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51318115 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 51318115.

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 3 ways as a sum of consecutive naturals, for example, 5131807 + ... + 5131816.

It is an arithmetic number, because the mean of its divisors is an integer number (15395436).

Almost surely, 2^51318115 is an apocalyptic number.

51318115 is a deficient number, since it is larger than the sum of its proper divisors (10263629).

51318115 is a wasteful number, since it uses less digits than its factorization.

51318115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10263628.

The product of its digits is 600, while the sum is 25.

The square root of 51318115 is about 7163.6663099282. Note that the first 3 decimals coincide. The cubic root of 51318115 is about 371.6124297198.

The spelling of 51318115 in words is "fifty-one million, three hundred eighteen thousand, one hundred fifteen".