51388315 has 16 divisors (see below), whose sum is σ = 68129280. Its totient is φ = 36897120.

The previous prime is 51388307. The next prime is 51388327.

51388315 is nontrivially palindromic in base 10.

51388315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51388315 - 2³ = 51388307 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 1569 + ... + 10258.

It is an arithmetic number, because the mean of its divisors is an integer number (4258080).

Almost surely, 2^51388315 is an apocalyptic number.

51388315 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51388315 is a deficient number, since it is larger than the sum of its proper divisors (16740965).

51388315 is a wasteful number, since it uses less digits than its factorization.

51388315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11922.

The product of its digits is 14400, while the sum is 34.

The square root of 51388315 is about 7168.5643611535. The cubic root of 51388315 is about 371.7818001028.

The spelling of 51388315 in words is "fifty-one million, three hundred eighty-eight thousand, three hundred fifteen".