51312647 has 8 divisors (see below), whose sum is σ = 54475056. Its totient is φ = 48166272.

The previous prime is 51312641. The next prime is 51312659. The reversal of 51312647 is 74621315.

51312647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51312647 - 2¹⁶ = 51247111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312641) 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 7 ways as a sum of consecutive naturals, for example, 2948 + ... + 10550.

It is an arithmetic number, because the mean of its divisors is an integer number (6809382).

Almost surely, 2^51312647 is an apocalyptic number.

51312647 is a deficient number, since it is larger than the sum of its proper divisors (3162409).

51312647 is a wasteful number, since it uses less digits than its factorization.

51312647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8017.

The product of its digits is 5040, while the sum is 29.

The square root of 51312647 is about 7163.2846516106. The cubic root of 51312647 is about 371.5992306839.

The spelling of 51312647 in words is "fifty-one million, three hundred twelve thousand, six hundred forty-seven".