51328315 has 4 divisors (see below), whose sum is σ = 61593984. Its totient is φ = 41062648.

The previous prime is 51328313. The next prime is 51328331. The reversal of 51328315 is 51382315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51382315 = 5 ⋅10276463.

It is a cyclic number.

It is not a de Polignac number, because 51328315 - 2¹ = 51328313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51328313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5132827 + ... + 5132836.

It is an arithmetic number, because the mean of its divisors is an integer number (15398496).

Almost surely, 2^51328315 is an apocalyptic number.

51328315 is a deficient number, since it is larger than the sum of its proper divisors (10265669).

51328315 is a wasteful number, since it uses less digits than its factorization.

51328315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10265668.

The product of its digits is 3600, while the sum is 28.

The square root of 51328315 is about 7164.3782005140. The cubic root of 51328315 is about 371.6370486787.

The spelling of 51328315 in words is "fifty-one million, three hundred twenty-eight thousand, three hundred fifteen".